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 any first sub-battery is electrically connected with the adjacent first sub-battery; 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 any second sub-battery is electrically connected with the adjacent second sub-battery; the battery management module is electrically connected with the first lithium battery pack and the second lithium battery pack, and the battery management module is used for acquiring the battery electric quantity of the first lithium battery pack and the second lithium battery pack; wherein any first sub-battery is adjacent to at least one second sub-battery, and the battery power of the first lithium battery pack is greater than that of the second lithium battery pack. The lithium battery system and the electronic equipment provided by the invention aim at preventing a heat spreading phenomenon of the lithium 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 multiple first sub-batteries, and any of the first sub-batteries is electrically connected to the adjacent first sub-battery; the second lithium battery group is insulated from the first lithium battery group, and the second lithium battery group includes multiple second sub-batteries, and any of the second sub-battery is electrically connected to the adjacent second sub-battery; 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; wherein any of the first sub-batteries is adjacent to at least one of the second sub-batteries, and the battery power of the first lithium battery group is greater than the battery power of the second lithium battery group.

[0007] 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.

[0008] 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.

[0009] 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 first battery cell located in the first battery column and the second battery cell located in the first battery column are adjacently arranged along the second direction, and the first battery cell located in the second battery column and the second battery cell located in the second battery column are adjacently arranged along the second direction.

[0010] Optionally, in some embodiments of the present application, 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 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 are arranged alternately.

[0011] Optionally, in some embodiments of the present application, the number of the first sub-batteries located in the first battery unit is not equal to the number of the second sub-batteries located in the second battery unit.

[0012] Optionally, in some embodiments of the present application, the number of the first sub-batteries located in the first battery unit is equal to the number of the second sub-batteries located in the second battery unit.

[0013] 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.

[0014] 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 or the second sub-batteries located in the first battery column are electrically connected in sequence from the first input terminal to the first output terminal; the second battery column includes a second input terminal and a second output terminal, the second input terminal is adjacent to the first output terminal, and a plurality of the first sub-batteries or 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; the first sub-battery located at the first output terminal is electrically connected to the first sub-battery located at the second input terminal, and the first sub-battery located at the second output terminal is electrically connected to the first sub-battery located at the first input terminal of another adjacent first battery column, or the second sub-battery located at the first output terminal is electrically connected to the second sub-battery located at the second input terminal, and the second sub-battery located at the second output terminal is electrically connected to the second sub-battery located at the first input terminal of another adjacent first battery column.

[0015] Optionally, in some embodiments of the present application, the types of the plurality of first sub-batteries are all the same, the types of the plurality of second sub-batteries are all the same, and the types of the first sub-batteries are different from the types of the second sub-batteries.

[0016] Optionally, in some embodiments of the present application, the type of the first sub-battery includes a ternary lithium battery or a solid-state lithium battery, and the second sub-battery includes a lithium iron phosphate battery or a sodium ion battery.

[0017] Optionally, in some embodiments of the present application, the lithium battery system also includes a third lithium battery group, which is insulated from the first lithium battery group and the second lithium battery group, and the third lithium battery group includes a plurality of third sub-batteries, at least some of the third sub-batteries are arranged adjacent to the first sub-battery and / or the second sub-battery; the battery power of the third lithium battery group is less than the battery power of the second lithium battery group.

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

[0019] Optionally, in some embodiments of the present application, the type of the third sub-battery includes: a ternary lithium battery, a solid-state lithium battery, a lithium iron phosphate battery or a sodium ion battery.

[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, any of the first sub-batteries is electrically connected to the adjacent first sub-battery; 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, any of the second sub-batteries is electrically connected to the adjacent second sub-battery; 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; wherein any of the first sub-batteries is adjacent to at least one of the second sub-batteries, and the battery power of the first lithium battery group is greater than the battery power of the second lithium battery group. That is, the lithium battery system provided in the present application forms a mutually insulated first lithium battery group and a second lithium battery group by connecting the adjacently arranged first sub-batteries and the second sub-batteries with different battery power to different circuits respectively. Due to the large differences in the thermal runaway behaviors of lithium batteries under different states of charge, during the operation of the lithium battery system, since the second lithium battery group with lower battery power is adjacent to the first lithium battery group with higher battery power, the energy transferred to the first sub-battery or the second sub-battery through the tab 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. 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 , including: a first lithium battery pack 10 , a second lithium battery pack 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 , and any first sub-battery 11 is electrically connected to adjacent first sub-batteries 11 .

[0027] In the embodiment of the present application, 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 , and any second sub-battery 21 is electrically connected to adjacent second sub-batteries 21 .

[0028] 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, and 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 .

[0029] Any first sub-battery 11 is adjacent to at least one second sub-battery 21 , and the battery power of the first lithium battery group 10 is greater than the battery power of the second lithium battery group 20 .

[0030] The lithium battery system 100 provided in the present application forms a mutually insulated first lithium battery group 10 and a second lithium battery group 20 by connecting adjacently arranged first sub-battery 11 and second sub-battery 21 with different battery capacities to different circuits. Based on the large difference in thermal runaway behaviors of lithium batteries under different states of charge, during the operation of the lithium battery system, since the second lithium battery group 20 with a lower battery capacities is adjacent to the first lithium battery group 10 with a higher battery capacities, 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.

[0031] like Figure 1 As shown, 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 adjacently arranged along the second direction Y, and the second battery column L2 includes at least a plurality of second sub-batteries 21 adjacently arranged along the second direction Y. At least some of the first sub-batteries 11 and the second sub-batteries 21 are adjacently arranged along the first direction X, and the first direction X is perpendicular to the second direction Y.

[0032] like Figure 1 As shown, the number of first sub-batteries 11 in the first battery column L1 is equal to the number of second sub-batteries 21 in the second battery column L2, and the first sub-batteries 11 and the second sub-batteries 21 are adjacent and alternately arranged along the first direction X. Specifically, the first battery column L1 is composed of a plurality of first sub-batteries 11. The second battery column L2 is composed of a plurality of second sub-batteries 21.

[0033] like Figure 2 As shown, an embodiment of the present application provides a lithium battery system 200, including: a first lithium battery group 10, a second lithium battery group 20 and a battery management module 30. 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 a first direction X.

[0034] In an embodiment of the present application, the first battery column L1 and the second battery column L2 both include a first battery cell U1 and a second battery cell U2 adjacently arranged along a second direction Y, the first battery cell U1 includes a plurality of first sub-batteries 11 adjacently arranged along the second direction Y, and the second battery cell U2 includes a plurality of second sub-batteries 21 adjacently arranged along the second direction Y.

[0035] In the embodiment of the present application, the first battery unit U1 located in the first battery column L1 and the second battery unit U2 located in the first battery column L1 are adjacently arranged along the second direction Y, and the first battery unit U1 located in the second battery column L2 and the second battery unit U2 located in the second battery column L2 are adjacently arranged along the second direction Y.

[0036] In the embodiment of the present application, the first battery unit U1 located in the first battery column L1 and the first battery unit U1 located in the second battery column L2 are arranged adjacent to each other along the first direction X, and the second battery unit U2 located in the first battery column L1 and the second battery unit U2 located in the second battery column L2 are arranged adjacent to each other along the first direction X. For example, the first battery unit U1 located at both ends of the first battery column L1 includes one first sub-battery 11, the first battery unit U1 located in the middle of the first battery column L1 includes two first sub-batteries 11 arranged adjacent to each other along the second direction Y, the first battery unit U1 located at both ends of the second battery column L2 includes one first sub-battery 11, and the first battery unit U1 located in the middle of the second battery column L2 includes two second sub-batteries 21 arranged adjacent to each other along the second direction Y.

[0037] Alternatively, the second battery cell U2 located at both ends of the first battery column L1 includes a second sub-battery 21, the second battery cell U2 located in the middle of the first battery column L1 includes two second sub-batteries 21 adjacently arranged along the second direction Y, the second battery cell U2 located at both ends of the second battery column L2 includes a second sub-battery 21, and the second battery cell U2 located in the middle of the second battery column L2 includes two second sub-batteries 21 adjacently arranged along the second direction Y.

[0038] The other structures of the battery 200 are the same as those of the battery 100 and thus will not be described again.

[0039] like Figure 3 As shown, an embodiment of the present application provides a lithium battery system 300, including: a first lithium battery group 10, a second lithium battery group 20 and a battery management module 30. 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 a first direction X.

[0040] In an embodiment of the present application, the first battery column L1 and the second battery column L2 both include a first battery cell U1 and a second battery cell U2 adjacently arranged along a second direction Y, the first battery cell U1 includes a plurality of first sub-batteries 11 adjacently arranged along the second direction Y, and the second battery cell U2 includes a plurality of second sub-batteries 21 adjacently arranged along the second direction Y.

[0041] In the embodiment of the present application, the first battery unit U1 located in the first battery column L1 and the second battery unit U2 located in the first battery column L1 are adjacently arranged along the second direction Y, and the first battery unit U1 located in the second battery column L2 and the second battery unit U2 located in the second battery column L2 are adjacently arranged along the second direction Y.

[0042] In the embodiment of the present application, the first battery unit U1 located in the first battery column L1 and the second battery unit U2 located in the second battery column L2 are disposed adjacent to each other along the first direction X, and the second battery unit U2 located in the first battery column L1 and the first battery unit U1 located in the second battery column L2 are disposed adjacent to each other along the first direction X. The number of the first battery unit U1 located in the first battery column L1 is greater than the number of the second battery unit U2 located in the first battery column L1, and the number of the second battery unit U2 located in the second battery column L2 is greater than the number of the first battery unit U1 located in the second battery column L2.

[0043] For example, the first battery column L1 includes two first battery cells U1 arranged at intervals along the second direction Y and one second battery cell U2, and the second battery cell U2 is located between the two first battery cells U1. The second battery column L2 includes two second battery cells U2 arranged at intervals along the second direction Y and one first battery cell U1, and the first battery cell U1 is located between the two first battery cells U1. If the number of first battery cells U1 in the first battery column L1 is N, the number of second battery cells U2 in the first battery column L1 is NM, where N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1.

[0044] The other structures of the battery 300 are the same as those of the battery 100 and thus will not be described in detail herein.

[0045] like Figure 4 and Figure 5 As shown, an embodiment of the present application provides a lithium battery system 400 / 500, comprising: a first lithium battery group 10, a second lithium battery group 20 and a battery management module 30. 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 a first direction X.

[0046] In an embodiment of the present application, the first battery column L1 and the second battery column L2 both include a first battery cell U1 and a second battery cell U2 adjacently arranged along a second direction Y, the first battery cell U1 includes a plurality of first sub-batteries 11 adjacently arranged along the second direction Y, and the second battery cell U2 includes a plurality of second sub-batteries 21 adjacently arranged along the second direction Y.

[0047] In the embodiment of the present application, the number of the first battery cells U1 in the first battery column L1 is equal to the number of the second battery cells U2 in the first battery column L1 and they are arranged alternately. The number of the first battery cells U1 in the second battery column L2 is equal to the number of the second battery cells U2 in the second battery column L2 and they are arranged alternately.

[0048] In the embodiment of the present application, the first battery unit U1 in the first battery column L1 and the second battery unit U2 in the second battery column L2 are disposed adjacent to each other along the first direction X. The second battery unit U2 in the first battery column L1 and the first battery unit U1 in the second battery column L2 are disposed adjacent to each other along the first direction X.

[0049] like Figure 4As shown, the number of the first sub-batteries 11 located in the first battery unit U1 is not equal to the number of the second sub-batteries 21 located in the second battery unit U2. Specifically, the number of the first sub-batteries 11 located in the first battery unit U1 is K, and the number of the second sub-batteries 21 located in the second battery unit U2 is KP, where K is a positive integer greater than or equal to 2, and P is a positive integer greater than or equal to 1. For example, the number of the first sub-batteries 11 located in the first battery unit U1 is 3, and the number of the second sub-batteries 21 located in the second battery unit U2 is 2.

[0050] Alternatively, the number of the second sub-batteries 21 located in the second battery unit U2 is K, and the number of the first sub-batteries 11 located in the first battery unit U1 is KP, where K is a positive integer greater than or equal to 2, and P is a positive integer greater than or equal to 1. For example, the number of the second sub-batteries 21 located in the second battery unit U2 is 3, and the number of the first sub-batteries 11 located in the first battery unit U1 is 2.

[0051] like Figure 5 As shown, the number of the first sub-batteries 11 located in the first battery unit U1 is equal to the number of the second sub-batteries 21 located in the second battery unit U2.

[0052] The other structures of the battery 400 / 500 are the same as those of the battery 100, and thus will not be described in detail here.

[0053] like Figure 6 As shown, an embodiment of the present application provides a lithium battery system 600, including: a first lithium battery group 10, a second lithium battery group 20 and a battery management module 30. 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 a first direction X.

[0054] In the embodiment of the present application, a plurality of first sub-batteries 11 and a plurality of second sub-batteries 21 are arranged in an array, wherein the first sub-batteries 11 and the second sub-batteries 21 are arranged alternately along the first direction X and the first sub-batteries 11 and the second sub-batteries 21 are arranged alternately along the second direction Y. Preferably, the number of the first sub-batteries 11 is equal to the number of the second sub-batteries 21 to improve the energy distribution management capability, thereby improving the control capability of heat spread.

[0055] In the embodiment of the present application, the first battery column L1 includes a first input terminal and a first output terminal, and a plurality of first sub-batteries 11 or second sub-batteries 21 located in the first battery column L1 are electrically connected in sequence from the first input terminal to the first output terminal. The second battery column L2 includes a second input terminal and a second output terminal, and the second input terminal is adjacent to the first output terminal, and a plurality of first sub-batteries 11 or second sub-batteries 21 located in the second battery column L2 are electrically connected in sequence from the second input terminal to the second output terminal. The first sub-battery 11 located at the first output terminal is electrically connected to the first sub-battery 11 located at the second input terminal, and the first sub-battery 11 located at the second output terminal is electrically connected to the first sub-battery 11 located at the first input terminal of another adjacent first battery column L1, or the second sub-battery 21 located at the first output terminal is electrically connected to the second sub-battery 21 located at the second input terminal, and the second sub-battery 21 located at the second output terminal is electrically connected to the second sub-battery 21 located at the first input terminal of another adjacent first battery column L1.

[0056] Specifically, the first input terminal includes a first sub-input terminal and a second sub-input terminal, the first output terminal includes a first sub-output terminal and a 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.

[0057] Specifically, the plurality of first sub-batteries 11 located in the first battery column L1 are electrically connected in sequence from the first sub-input end to the first sub-output end. The second sub-input end is adjacent to the first sub-output end, and the plurality of first sub-batteries 11 located in the second battery column L2 are electrically connected in sequence from the second sub-input end to the second sub-output end. The first sub-battery 11 located at the first sub-output end is electrically connected to the first sub-battery 11 located at the second sub-input end, and the first sub-battery 11 located at the second sub-output end is electrically connected to the first sub-battery 11 located at the first sub-input end of another adjacent first battery column L1.

[0058] Specifically, the plurality of second sub-batteries 21 located in the first battery column L1 are electrically connected in sequence from the third sub-input terminal to the third sub-output terminal. The fourth sub-input terminal is adjacent to the third sub-output terminal, and the plurality of second sub-batteries 21 located in the second battery column L2 are electrically connected in sequence from the fourth sub-input terminal to the fourth sub-output terminal. The second sub-battery 21 located at the third sub-output terminal is electrically connected to the second sub-battery 21 located at the fourth sub-input terminal, and the second sub-battery 21 located at the fourth sub-output terminal is electrically connected to the second sub-battery 21 located at the third sub-input terminal of another adjacent first battery column L1.

[0059] In the embodiment of the present application, the types of the plurality of first sub-batteries 11 are all the same, the types of the plurality of second sub-batteries 21 are all the same, and the types of the first sub-batteries 11 are different from the types of the second sub-batteries 21 .

[0060] In the embodiment of the present application, the type of the first sub-battery 11 includes a ternary lithium battery or a solid-state lithium battery, and the second sub-battery 21 includes a lithium iron phosphate battery or a sodium ion battery.

[0061] The other structures of the battery 600 are the same as those of the battery 100 and will not be described again.

[0062] like Figure 7 As shown, an embodiment of the present application provides a lithium battery system 700, including: a first lithium battery group 10, a second lithium battery group 20, a third lithium battery group 40 and a battery management module 30. The first lithium battery group 10, the second lithium battery group 20 and the third lithium battery group 40 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 a first direction X.

[0063] In the embodiment of the present application, the third lithium battery group 40 is insulated from the first lithium battery group 10 and the second lithium battery group 20, and the third lithium battery group 40 includes a plurality of third sub-batteries 41, at least some of which are arranged adjacent to the first sub-battery 11 and / or the second sub-battery 21. The battery power of the third lithium battery group 40 is less than the battery power of the second lithium battery group 20.

[0064] In the embodiment of the present application, the first sub-cell 11 , the second sub-cell 21 and the third sub-cell 41 are arranged alternately along the first direction X and the first sub-cell 11 , the second sub-cell 21 and the third sub-cell 41 are arranged alternately along the second direction Y.

[0065] In the embodiment of the present application, the types of the third sub-battery 41 include: a ternary lithium battery, a solid-state lithium battery, a lithium iron phosphate battery or a sodium ion battery.

[0066] The other structures of the battery 700 are the same as those of the battery 100 and will not be described again.

[0067] On the other hand, the present application provides an electronic device, which includes the lithium battery system as above.

[0068] The lithium battery system in the electronic device provided in the present application forms a mutually insulated first lithium battery group 10 and a second lithium battery group 20 by connecting adjacently arranged first sub-battery 11 and second sub-battery 21 with different battery capacities to different circuits. Based on the large difference in thermal runaway behaviors of lithium batteries under different states of charge, during the operation of the lithium battery system, since the second lithium battery group 20 with a lower battery capacities is adjacent to the first lithium battery group 10 with a higher battery capacities, 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.

[0069] 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 group, wherein the first lithium battery group includes a plurality of first sub-batteries, and any of the first sub-batteries is electrically connected to adjacent first sub-batteries; A second lithium battery group, wherein 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, and any of the second sub-batteries is electrically connected to adjacent second sub-batteries; A battery management module, 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; Wherein, any one of the first sub-batteries is adjacent to at least one of the second sub-batteries, and the battery power of the first lithium battery group is greater than the battery power of the second lithium battery group.

2. The lithium battery system according to claim 1, 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.

3. The lithium battery system according to claim 2, 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.

4. The lithium battery system according to claim 2, 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 first battery cell in the first battery column and the second battery cell in the first battery column are adjacent to each other along the second direction, and the first battery cell in the second battery column and the second battery cell in the second battery column are adjacent to each other along the second direction.

5. The lithium battery system according to claim 4, characterized in that: 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.

6. The lithium battery system according to claim 5, characterized in that: The number of the first sub-batteries located in the first battery unit is not equal to the number of the second sub-batteries located in the second battery unit.

7. The lithium battery system according to claim 5, characterized in that: The number of the first sub-batteries located in the first battery unit is equal to the number of the second sub-batteries located in the second battery unit.

8. The lithium battery system according to claim 2, 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.

9. The lithium battery system according to claim 2, characterized in that: The first battery column comprises a first input terminal and a first output terminal, and a plurality of the first sub-batteries or the second sub-batteries located in the first battery column are electrically connected in sequence from the first input terminal to the first output terminal; The second battery column comprises a second input end and a second output end, the second input end is adjacent to the first output end, and a plurality of the first sub-batteries or 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; The first sub-battery located at the first output terminal is electrically connected to the first sub-battery located at the second input terminal, and the first sub-battery located at the second output terminal is electrically connected to the first sub-battery located at the first input terminal of another adjacent first battery column, or the second sub-battery located at the first output terminal is electrically connected to the second sub-battery located at the second input terminal, and the second sub-battery located at the second output terminal is electrically connected to the second sub-battery located at the first input terminal of another adjacent first battery column.

10. The lithium battery system according to claim 9, characterized in that: The types of the plurality of first sub-batteries are all the same, the types of the plurality of second sub-batteries are all the same, and the types of the first sub-batteries are different from the types of the second sub-batteries.

11. The lithium battery system according to claim 10, characterized in that: The type of the first sub-battery includes a ternary lithium battery or a solid-state lithium battery, and the type of the second sub-battery includes a lithium iron phosphate battery or a sodium ion battery.

12. The lithium battery system according to claim 2, characterized in that: The lithium battery system further includes a third lithium battery group, the third lithium battery group is insulated from the first lithium battery group and the second lithium battery group, the third lithium battery group includes a plurality of third sub-batteries, at least some of the third sub-batteries are arranged adjacent to the first sub-battery and / or the second sub-battery; The battery power of the third lithium battery pack is less than the battery power of the second lithium battery pack.

13. The lithium battery system according to claim 12, characterized in that: The first sub-cell, the second sub-cell and the third sub-cell are arranged alternately along the first direction and the first sub-cell, the second sub-cell and the third sub-cell are arranged alternately along the second direction.

14. The lithium battery system according to claim 12, characterized in that: The types of the third sub-battery include: ternary lithium battery, solid-state lithium battery, lithium iron phosphate battery or sodium ion battery.

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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