Lithium battery system and electronic equipment

Abstract

The invention discloses a lithium battery system and electronic equipment, the lithium battery system comprises a first lithium battery pack, a second lithium battery pack and a battery management module, the first lithium battery pack comprises a plurality of first sub-batteries, and at least part 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 comprises a plurality of second sub-batteries, and at least part of the second sub-batteries are electrically connected; the battery management module is electrically connected with the first lithium battery pack and the second lithium battery pack and is used for acquiring the battery electric quantity of the first lithium battery pack and the second lithium battery pack; controlling the charging time of the first lithium battery pack to be earlier than the charging time of the second lithium battery pack or controlling the discharging time of the second lithium battery pack to be earlier than the discharging time of the first lithium battery pack; wherein the type of the first sub-batteries is the same as that of the second sub-batteries, and each first sub-battery is adjacent to at least one second sub-battery.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a lithium battery system and electronic equipment. Background Art

[0002] With the rapid development of new energy vehicles 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 battery triggers thermal runaway due to electrical, mechanical, thermal abuse, etc., it will quickly release a large amount of heat due to the violent chain redox reaction. This part of energy may cause thermal runaway of surrounding batteries, thereby triggering heat 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 heat spread in lithium batteries is an urgent problem to be solved. Summary of the invention

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

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

[0007] Optionally, in some embodiments of the present 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 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; 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-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 each other and alternately arranged along the first direction.

[0010] Optionally, in some embodiments of the present application, the first battery column includes a first input terminal and a first output terminal, and a plurality of the first sub-batteries located in the first battery column are electrically connected in sequence from the first input terminal to the first output terminal, at least two of the first input terminals are electrically connected, and at least two of the first output terminals are electrically connected; the second battery column includes a second input terminal and a second output terminal, and the second sub-batteries located in the second battery column are electrically connected in sequence from the second input terminal to the second output terminal, at least two of the second input terminals are electrically connected, and at least two of the second output terminals 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 method between the plurality of the first sub-batteries is the same as the connection method 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 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 first battery column, the first input end of the second first battery column and the output end of the power 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 power management module.

[0014] Optionally, in some embodiments of the present application, the first input end of the first first battery column is electrically connected to the output end of the power 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 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 first battery column, the first input end of the Nth first battery column, and the output end of the power management module are electrically connected, and the first output end of the first first battery column, the first output end of the Nth first battery column, and the input end of the power 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 power 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 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 ends 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, the first battery column and the second battery column both include a first battery cell and a second battery cell adjacently arranged along the second direction, the first battery cell includes a plurality of the first sub-batteries adjacently arranged along the second direction, and the second battery cell includes a plurality of the second sub-batteries adjacently arranged along the second direction; the number of the first battery cells located in the first battery column is equal to the number of the second battery cells located in the first battery column and are arranged alternately; the number of the first battery cells located in the second battery column is equal to the number of the second battery cells located in the second battery column and are arranged alternately; the first battery cells and the second battery cells are arranged alternately along the first direction.

[0018] Optionally, in some embodiments of the present application, the first sub-cells and the second sub-cells are arranged alternately along the first direction, and the first sub-cells and the second sub-cells 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 first sub-battery located in the first battery column is electrically connected to the first sub-input terminal, the last first sub-battery located in the first battery column and arranged along the second direction is electrically connected to the first sub-output terminal, and a plurality of the first sub-batteries located 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 located in the first battery column is electrically connected to the second sub-input terminal, the last second sub-battery located in the first battery column and arranged along the second direction is electrically connected to the second sub-output terminal, and a plurality of the second sub-batteries located in the first battery column are electrically connected from the second sub-input terminal to the second sub-output terminal. The first and second sub-input terminals are electrically connected in sequence in the direction of the third sub-input 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 first sub-battery located in the second battery column is electrically connected to the third sub-input terminal, the last first sub-battery located in the second battery column and arranged along the second direction is electrically connected to the third sub-output terminal, and a plurality of the first sub-batteries located 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 located in the second battery column is electrically connected to the fourth sub-input terminal, the last second sub-battery located in the second battery column and arranged along the second direction is electrically connected to the fourth sub-output terminal, and a plurality of the second sub-batteries located 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, which includes the lithium battery system as described above.

[0021] In the lithium battery system and electronic device provided in the present application, the lithium battery system includes a first lithium battery group, a second lithium battery group and a battery management module, the first lithium battery group includes a plurality of first sub-batteries, at least some of which are electrically connected; the second lithium battery group is insulated from the first lithium battery group, the second lithium battery group includes a plurality of second sub-batteries, at least some of which are electrically connected; the battery management module is electrically connected to the first lithium battery group and the second lithium battery group respectively, and the battery management module is used to obtain the battery power of the first lithium battery group and the second lithium battery group, and control the charging time of the first lithium battery group to be earlier than the charging time of the second lithium battery group or control the discharge time of the second lithium battery group to be earlier than the discharge time of the first lithium battery group; wherein the type of the first sub-battery is the same as the type of the second sub-battery, and each of the first sub-battery is adjacent to at least one of the second sub-batteries. That is, the lithium battery system provided in the present application is arranged adjacent to and insulated from the first lithium battery group and the second lithium battery group, and the charging and discharging time of the first lithium battery group and the second lithium battery group are controlled by the power management module to be different so that the battery power is different in the same period. Based on the principle that the thermal runaway behaviors of lithium batteries vary greatly under different states of charge, by arranging a first lithium battery group and a second lithium battery group with different battery capacities adjacent to each other, the energy transferred to the first sub-battery or the second sub-battery through the tab after thermal runaway of the battery occurs during the operation of the lithium battery system can be effectively reduced, that is, the propagation of thermal runaway between battery groups can be effectively suppressed, thereby preventing heat spread in lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a lithium battery system according to a first embodiment of the present application; Figure 2 is a schematic diagram of a lithium battery system according to a second embodiment of the present application; Figure 3 is a schematic diagram of a lithium battery system according to a third embodiment of the present application; Figure 4 is a schematic diagram of a lithium battery system according to a fourth embodiment of the present application; Figure 5 is a schematic diagram of a lithium battery system according to a fifth embodiment of the present application; Figure 6 is a schematic diagram of a lithium battery system according to a sixth embodiment of the present application; Figure 7 Schematic diagram of a lithium battery system according to a seventh embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0024] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0025] like Figure 1 As shown, an embodiment of the present application provides a lithium battery system 100 , which includes a first lithium battery group 10 , a second lithium battery group 20 , and a battery management module 30 .

[0026] In the embodiment of the present application, the first lithium battery pack 10 includes a plurality of first sub-batteries 11, at least some of which are electrically connected. The second lithium battery pack 20 is insulated from the first lithium battery pack 10, and includes a plurality of second sub-batteries 21, at least some of which are electrically connected.

[0027] In an embodiment of the present application, the battery management module 30 is electrically connected to the first lithium battery group 10 and the second lithium battery group 20, respectively. The battery management module 30 is used to obtain the battery power of the first lithium battery group 10 and the second lithium battery group 20, and to control the charging time of the first lithium battery group 10 to be earlier than the charging time of the second lithium battery group 20 or to control the discharging time of the second lithium battery group 20 to be earlier than the discharging time of the first lithium battery group 10.

[0028] In the embodiment of the present application, the battery power of the first lithium battery pack 10 is higher than the battery power of the second lithium battery pack 20. Specifically, the battery power of at least some of the first sub-batteries 11 is higher than the battery power of the second sub-batteries 21. Preferably, the battery power of each first sub-battery 11 is greater than the battery power of any second sub-battery 21.

[0029] The type of the first sub-cell 11 is the same as the type of the second sub-cell 21 , and each first sub-cell 11 is disposed adjacent to at least one second sub-cell 21 .

[0030] The lithium battery system 100 provided in the present application arranges the first lithium battery group 10 and the second lithium battery group 20 adjacently and insulated, and controls the charging and discharging time of the first lithium battery group 10 and the second lithium battery group 20 to be different through the battery management module 30 so that the battery capacities thereof are different in the same period of time. Based on the principle that the thermal runaway behaviors of lithium batteries differ greatly under different states of charge, the first lithium battery group 10 and the second lithium battery group 20 with different battery capacities are arranged adjacently, so that the energy transmitted to the first sub-battery 11 or the second sub-battery 21 through the tab after the battery thermal runaway occurs during the operation of the lithium battery system can be effectively reduced, that is, the propagation of thermal runaway between battery groups can be effectively suppressed, thereby preventing the thermal spread of lithium batteries.

[0031] Specifically, when a traditional lithium battery system discharges 50% of its energy, each battery has 50% battery power (50% SOC). By controlling the discharge time of the second lithium battery group 20 to be earlier than the discharge time of the first lithium battery group 10, it can be ensured that a part of the batteries are discharged before another part of the batteries (for example, the second lithium battery group 20 is discharged first, and the second lithium battery group 20 is all 0% SOC, and the first lithium battery group 10 has not yet started to discharge and is still fully charged). In this way, even if a first sub-battery 11 in the first lithium battery group 10 with 100% SOC has thermal runaway, the energy is not enough to cause thermal runaway of other surrounding batteries. Because the physical space of the battery is surrounded by batteries of the second lithium battery group 20 (0% SOC). The lower the battery power, the more difficult it is to trigger the thermal runaway process, and batteries with lower SOC will be safer.

[0032] In an 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 the type of the second sub-battery 21, for example, the first sub-battery 11 and the second sub-battery 21 are both ternary lithium batteries.

[0033] In the embodiment of the present application, the first lithium battery group 10 and the second lithium battery group 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 includes at least a plurality of first sub-batteries 11 disposed adjacently along the second direction Y, and the second battery column L2 includes at least a plurality of second sub-batteries 21 disposed adjacently along the second direction Y. At least some of the first sub-batteries 11 and the second sub-batteries 21 are disposed adjacently along the first direction X, and the first direction X is perpendicular to the second direction Y.

[0034] In the embodiment of the present application, the number of the first sub-cells 11 in the first battery column L1 is equal to the number of the second sub-cells 21 in the second battery column L2 , and the first sub-cells 11 and the second sub-cells 21 are adjacent to each other along the first direction X and are arranged alternately.

[0035] In an embodiment of the present application, the first battery column L1 includes a first input terminal IN1 and a first output terminal OU1, and a plurality of first sub-batteries 11 located in the first battery column L1 are electrically connected in sequence from the first input terminal IN1 to the first output terminal OU1, at least two first input terminals IN1 are electrically connected, and at least two first output terminals OU1 are electrically connected.

[0036] In the 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.

[0037] In an embodiment of the present application, the second battery column L2 includes a second input terminal IN2 and a second output terminal OU2. The second sub-batteries 21 located in the second battery column L2 are electrically connected in sequence from the second input terminal IN2 to the second output terminal OU2. At least two second input terminals IN2 are electrically connected, and at least two second output terminals OU2 are electrically connected.

[0038] In the 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.

[0039] In the embodiment of the present application, the number of the first battery column L1 is equal to the number of the second battery column L2 , and the connection method between the plurality of first sub-batteries 11 is the same as the connection method between the plurality of second sub-batteries 21 .

[0040] In the embodiment of the present application, the two first input terminals IN1 of any two adjacent first battery strings L1 are electrically connected to the output terminal 31 of the battery management module 30 , and the two first output terminals OU1 of the two first battery strings L1 are electrically connected to the input terminal 32 of the battery management module 30 .

[0041] Figure 1 Just as an example, as another embodiment of the present application, the N first input terminals IN1 of the adjacent N first battery columns L1 are electrically connected to the output terminal 31 of the battery management module 30, and the N first output terminals OU1 of the N first battery columns L1 are electrically connected to the input terminal 32 of the battery management module 30, N is a positive integer greater than or equal to 3, and the value of N includes 3, 4, 5, 6, 7, 8, 9, 10...

[0042] In the embodiment of the present application, the two second input terminals IN2 of any two adjacent second battery columns L2 are electrically connected to the output terminal 31 of the battery management module 30 , and the two second output terminals OU2 of the two second battery columns L2 are electrically connected to the input terminal 32 of the battery management module 30 .

[0043] Figure 1 Just as an example, as another embodiment of the present application, the N second input terminals IN2 of the N adjacent second battery columns L2 are electrically connected to the output terminal 31 of the battery management module 30, and the N second output terminals OU2 of the N second battery columns L2 are electrically connected to the input terminal 32 of the battery management module 30, N is a positive integer greater than or equal to 3, and the value of N includes 3, 4, 5, 6, 7, 8, 9, 10...

[0044] The lithium battery system provided by the present application arranges the first lithium battery group 10 and the second lithium battery group 20 adjacently and insulated, and controls the charging and discharging time of the first lithium battery group 10 and the second lithium battery group 20 to be different through the battery management module 30 so that the battery capacities thereof are different in the same period of time. Based on the large difference in the thermal runaway behaviors of lithium batteries at different states of charge, during the operation of the lithium battery system, since the first lithium battery group 10 and the second lithium battery group 20 with different battery capacities are adjacent, the energy transmitted to the first sub-battery 11 or the second sub-battery 21 through the tabs during the battery thermal runaway process is effectively reduced, that is, the propagation of thermal runaway between battery groups is effectively suppressed, thereby preventing the thermal spread of lithium batteries.

[0045] like Figure 2 As 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 string L1 and the first input terminal IN1 of the second first battery string L1 are electrically connected to the output terminal 31 of the battery management module 30, respectively, the first output terminal OU1 of the second first battery string L1 is electrically connected to the first input terminal IN1 of the third first battery string L1, and the first output terminal OU1 of the first first battery string L1 is electrically connected to the output terminal 31 of the fourth first battery string The first input terminal IN1 of L1 is electrically connected, the first output terminal OU1 of the 3rd first battery string L1 is electrically connected to the first input terminal IN1 of the 6th first battery string L1, the first output terminal OU1 of the 4th first battery string L1 is electrically connected to the first input terminal IN1 of the 5th first battery string L1, the first output terminal OU1 of the 5th first battery string L1 and the first output terminal OU1 of the 6th first battery string L1 are electrically connected to the first input terminal IN1 of at least one adjacent first battery string L1 or are electrically connected to the input terminal 32 of the battery management module 30.

[0046] In the embodiment of the present application, the number of the first battery column L1 is equal to the number of the second battery column L2 , and the connection method between the plurality of first sub-batteries 11 is the same as the connection method between the plurality of second sub-batteries 21 .

[0047] In an embodiment of the present application, the second input terminal IN2 of the first second battery column L2 and the second input terminal 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 are electrically connected to the input terminal 32 of the battery management module 30.

[0048] The other structures of the lithium battery system 200 are the same as those of the lithium battery system 100 , and thus will not be described again.

[0049] like Figure 3 As 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, and 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.

[0050] In the embodiment of the present application, the number of the first battery column L1 is equal to the number of the second battery column L2 , and the connection method between the plurality of first sub-batteries 11 is the same as the connection method between the plurality of second sub-batteries 21 .

[0051] In an embodiment of the present application, the second input terminal IN2 of the first second battery string 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 string L2 is electrically connected to the second input terminal IN2 of the second second battery string L2, the second output terminal OU2 of the second second battery string L2 is electrically connected to the second input terminal IN2 of the third second battery string L2, the second output terminal OU2 of the third second battery string L2 is electrically connected to the second input terminal IN2 of the fourth second battery string L2, and the second output terminal OU2 of the fourth second battery string L2 is electrically connected to the second input terminal IN2 of the fifth second battery string L2 or to the input terminal 32 of the battery management module 30.

[0052] The other structures of the lithium battery system 300 are the same as those of the lithium battery system 100 , and thus will not be described in detail herein.

[0053] like Figure 4 As 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 first battery columns L1 is N, and N is a positive integer greater than or equal to 4. The value of N includes 4, 5, 6, 7, 8, 9, 10...

[0054] In the embodiment of the present application, the first input terminal IN1 of the 1st first battery string L1, the first input terminal IN1 of the Nth first battery string L1, and the output terminal 31 of the battery management module 30 are electrically connected, and the first output terminal OU1 of the 1st first battery string L1, the first output terminal OU1 of the Nth first battery string L1, and the input terminal 32 of the battery management module 30 are electrically connected. The first input terminal IN1 of the 2nd first battery string L1, the first input terminal IN1 of the N-1th first battery string L1, and the output terminal 31 of the battery management module 30 are electrically connected, and the first output terminal OU1 of the 2nd first battery string L1, the first output terminal OU1 of the N-1th first battery string L1, and the input terminal 32 of the battery management module 30 are electrically connected.

[0055] In the embodiment of the present application, the number of the first battery column L1 is equal to the number of the second battery column L2 , and the connection method between the plurality of first sub-batteries 11 is the same as the connection method between the plurality of second sub-batteries 21 .

[0056] In the embodiment of the present application, the number of second battery strings 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 string L2, the second input terminal IN2 of the Nth second battery string L2, and the output terminal 31 of the battery management module 30 are electrically connected, and the second output terminal OU2 of the first second battery string L2, the second output terminal OU2 of the Nth second battery string 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 string L2, the second input terminal IN2 of the N-1th second battery string L2, and the output terminal 31 of the battery management module 30 are electrically connected, and the second output terminal OU2 of the second second battery string L2, the second output terminal OU2 of the N-1th second battery string L2, and the input terminal 32 of the battery management module 30 are electrically connected.

[0057] The other structures of the lithium battery system 400 are the same as those of the lithium battery system 100 , and thus will not be described again.

[0058] like Figure 5 As shown, the 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 first battery columns L1 is N, and 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 value of N includes 3, 4, 5, 6, 7, 8, 9, 10...

[0059] In the embodiment of the present application, the number of the first battery column L1 is equal to the number of the second battery column L2 , and the connection method between the plurality of first sub-batteries 11 is the same as the connection method between the plurality of second sub-batteries 21 .

[0060] In the embodiment of the present application, the number of the second battery strings 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 strings L2 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 strings L2 are all electrically connected to the input terminal 32 of the battery management module 30.

[0061] The other structures of the lithium battery system 500 are the same as those of the lithium battery system 100 , and thus will not be described in detail herein.

[0062] like Figure 6As shown, 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: the first battery column L1 and the second battery column L2 both include a first battery unit U1 and a second battery unit U2 adjacently arranged along the second direction Y, the first battery unit U1 includes a plurality of first sub-batteries 11 adjacently arranged along the second direction Y, and the second battery unit U2 includes a plurality of second sub-batteries 21 adjacently arranged along the second direction Y. The number of the first battery units U1 located in the first battery column L1 is equal to the number of the second battery units U2 located in the first battery column L1 and they are arranged alternately. The number of the first battery units U1 located in the second battery column L2 is equal to the number of the second battery units U2 located in the second battery column L2 and they are arranged alternately. The first battery units U1 and the second battery units U2 are arranged alternately along the first direction X.

[0063] In the 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 .

[0064] In an embodiment of the present application, the first first sub-battery 11 located in the first battery column L1 is electrically connected to the first sub-input terminal IN11, the last first sub-battery 11 located in the first battery column L1 and arranged along the second direction Y is electrically connected to the first sub-output terminal OU11, and the multiple first sub-batteries 11 located 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.

[0065] In the embodiment of the present application, the first second sub-battery 21 located in the first battery column L1 is electrically connected to the second sub-input terminal IN12, the last second sub-battery 21 located in the first battery column L1 and arranged along the second direction Y is electrically connected to the second sub-output terminal OU12, and the multiple second sub-batteries 21 located 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.

[0066] In the 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, and 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. 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.

[0067] In the embodiment of the present application, the first second sub-battery 21 located in the second battery column L2 is electrically connected to the fourth sub-input terminal IN22, the last second sub-battery 21 located in the second battery column L2 and arranged along the second direction Y is electrically connected to the fourth sub-output terminal OU22, and the multiple second sub-batteries 21 located 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.

[0068] For example, Figure 6 The electrical connection method of the plurality of first sub-batteries in the first lithium battery pack is Figure 3 The electrical connection method of the multiple first sub-batteries in the first lithium battery pack is the same, and Figure 6 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack is Figure 3 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack is the same. Specifically, Figure 6 The electrical connection method of the plurality of first sub-batteries in the first lithium battery pack can be the same as the above Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The electrical connection method of the multiple first sub-batteries in the first lithium battery pack in any one of the embodiments is the same, and Figure 6 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack can be the same as that described above. Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack in any one of the embodiments is the same.

[0069] The other structures of the lithium battery system 600 are the same as those of the lithium battery system 100 , and thus will not be described again.

[0070] like Figure 7 As 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.

[0071] In the 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 .

[0072] In an embodiment of the present application, the first first sub-battery 11 located in the first battery column L1 is electrically connected to the first sub-input terminal IN11, the last first sub-battery 11 located in the first battery column L1 and arranged along the second direction Y is electrically connected to the first sub-output terminal OU11, and the multiple first sub-batteries 11 located 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.

[0073] In the embodiment of the present application, the first second sub-battery 21 located in the first battery column L1 is electrically connected to the second sub-input terminal IN12, the last second sub-battery 21 located in the first battery column L1 and arranged along the second direction Y is electrically connected to the second sub-output terminal OU12, and the multiple second sub-batteries 21 located 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.

[0074] In the 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, and 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. 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.

[0075] In the embodiment of the present application, the first second sub-battery 21 located in the second battery column L2 is electrically connected to the fourth sub-input terminal IN22, the last second sub-battery 21 located in the second battery column L2 and arranged along the second direction Y is electrically connected to the fourth sub-output terminal OU22, and the multiple second sub-batteries 21 located 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.

[0076] For example, Figure 7 The electrical connection method of the plurality of first sub-batteries in the first lithium battery pack is Figure 3 The electrical connection method of the multiple first sub-batteries in the first lithium battery pack is the same, and Figure 7 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack is Figure 3 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack is the same. Specifically, Figure 7 The electrical connection method of the plurality of first sub-batteries in the first lithium battery pack can be the same as the above Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 The electrical connection method of the multiple first sub-batteries in the first lithium battery pack in any one of the embodiments is the same, and Figure 7 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack can be the same as that described above. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 The electrical connection method of the plurality of second sub-batteries in the second lithium battery pack in any one of the embodiments is the same.

[0077] The other structures of the lithium battery system 700 are the same as those of the lithium battery system 100 , and thus will not be described again.

[0078] On the other hand, the present application provides an electronic device, which includes the lithium battery system as above.

[0079] In the electronic device provided in the present application, the lithium battery system includes a first lithium battery group 10, a second lithium battery group 20 and a battery management module 30. The first lithium battery group 10 includes a plurality of first sub-batteries 11, at least some of which are electrically connected. The second lithium battery group 20 is insulated from the first lithium battery group 10, and the second lithium battery group 20 includes a plurality of second sub-batteries 21, at least some of which are electrically connected. The battery management module 30 is electrically connected to the first lithium battery group 10 and the second lithium battery group 20, respectively, and the battery management module 30 is used to obtain the battery power of the first lithium battery group 10 and the second lithium battery group 20, and to control the charging time of the first lithium battery group 10 to be earlier than the charging time of the second lithium battery group 20 or to control the discharge time of the second lithium battery group 20 to be earlier than the discharge time of the first lithium battery group 10. Among them, the type of the first sub-battery 11 is the same as the type of the second sub-battery 21, and each first sub-battery 11 is arranged adjacent to at least one second sub-battery 21. That is, the lithium battery system provided by the present application arranges the first lithium battery group 10 and the second lithium battery group 20 adjacently and insulated, and controls the charging and discharging time of the first lithium battery group 10 and the second lithium battery group 20 to be different through the battery management module 30 so that the battery capacities thereof are different in the same period of time. Based on the large difference in the thermal runaway behaviors of lithium batteries at different states of charge, during the operation of the lithium battery system, since the first lithium battery group 10 and the second lithium battery group 20 with different battery capacities are adjacent, the energy transmitted to the first sub-battery 11 or the second sub-battery 21 through the tabs during the battery thermal runaway process is effectively reduced, that is, the propagation of thermal runaway between battery groups is effectively suppressed, thereby preventing the thermal spread of lithium batteries.

[0080] A lithium battery system and an electronic device according to an embodiment of the present application are introduced in detail above. The description of the above embodiment is only used to help understand the core idea of ​​the present application, and the above description should not be construed as limiting the scope of protection 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 group, the second lithium battery group being insulated from the first lithium battery group, the second lithium battery group 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 being used to obtain the battery power 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 be earlier than the charging time of the second lithium battery group or to control the discharging time of the second lithium battery group to be earlier than the discharging time of the first lithium battery group; The type of the first sub-cell is the same as the type of the second sub-cell, and each of the first sub-cells is arranged adjacent to at least one of the second sub-cells.

2. The lithium battery system according to claim 1, characterized in that: 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.

3. The lithium battery system according to claim 1 or 2, characterized in that: 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 at least includes a plurality of the first sub-batteries arranged adjacent to each other along a second direction, and the second battery column at least includes a plurality of the second sub-batteries arranged adjacent to each other along the second direction; At least part of the first sub-cells and the second sub-cells are disposed adjacent to each other along the first direction, and the first direction is perpendicular to the second direction.

4. The lithium battery system according to claim 3, characterized in that: 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 each other and alternately arranged along the first direction.

5. The lithium battery system according to claim 4, characterized in that: The first battery column comprises a first input terminal and a first output terminal, and the plurality of the first sub-batteries in the first battery column are electrically connected in sequence from the first input terminal to the first output terminal, at least two of the first input terminals are electrically connected, and at least two of the first output terminals are electrically connected; The second battery column includes a second input terminal and a second output terminal. The second sub-batteries in the second battery column are electrically connected in sequence from the second input terminal to the second output terminal. At least two of the second input terminals are electrically connected, and at least two of the second output terminals are electrically connected.

6. The lithium battery system according to claim 5, 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.

7. The lithium battery system according to claim 6, characterized in that: 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 two first battery columns are electrically connected to the input end of the power management module.

8. The lithium battery system according to claim 6, 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 power 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 power management module.

9. The lithium battery system according to claim 6, characterized in that: The first input end of the first first battery column is electrically connected to the output end of the power 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 power management module.

10. The lithium battery system according to claim 6, 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 column, the first input end of the Nth first battery column, and the output end of the power management module are electrically connected, and the first output end of the first first battery column, the first output end of the Nth first battery column, and the input end of the power 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 power 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 power management module are electrically connected.

11. The lithium battery system according to claim 6, 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 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.

12. The lithium battery system according to claim 6, 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.

13. The lithium battery system according to claim 6, characterized in that: The first sub-cells and the second sub-cells are arranged alternately along the first direction and the first sub-cells and the second sub-cells are arranged alternately along the second direction.

14. The lithium battery system according to claim 12 or 13, 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-battery in the first battery column is electrically connected to the first sub-input terminal, the last first sub-battery 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-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 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 sub-battery located in the second battery column is electrically connected to the third sub-input terminal, the last first sub-battery located in the second battery column and arranged along the second direction is electrically connected to the third sub-output terminal, and the plurality of first sub-batteries located 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 located in the second battery column is electrically connected to the fourth sub-input terminal, the last second sub-battery located in the second battery column and arranged along the second direction is electrically connected to the fourth sub-output terminal, and the multiple second sub-batteries located in the second battery column are electrically connected in sequence from the fourth sub-input terminal to the fourth sub-output terminal.

15. An electronic device, characterized in that: The electronic device comprises a lithium battery system as claimed in any one of claims 1 to 14.

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