Battery and electric equipment

Abstract

The utility model relates to a battery and electric equipment, the battery comprises a first pole core and a second pole core, the first pole core comprises a plurality of first pole pieces, the plurality of first pole pieces are arranged along a first direction, the second pole core comprises a plurality of second pole pieces, the plurality of second pole pieces are arranged along a second direction, and the first direction intersects with the second direction. According to the invention, the plurality of first pole pieces in the first pole core are arranged along the first direction, and the plurality of second pole pieces in the second pole core are arranged along the second direction, so that heat in the battery is discharged from a gap between two adjacent first pole pieces and a gap between two adjacent second pole pieces; therefore, the heat dissipation effect is improved, the electrochemical performance of the battery is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery and an electrical device using the same. Background Art

[0002] With the rapid development of the new energy era, the design requirements for lithium-ion batteries are getting higher and higher. While ensuring the most basic safety and reliability of the battery, how to design a battery with high capacity and high energy density is the most popular research direction in the current lithium-ion battery industry. Among them, the laminated battery can increase the energy density of the battery by increasing the number of stacked electrode sheets, and is widely used due to its high volume utilization rate, stable structure, small internal resistance and other advantages.

[0003] However, as the number of electrode sheets continues to increase, the battery becomes thicker, resulting in difficulty in discharging the heat inside the battery, which has a negative impact on the electrochemical performance and service life of the battery. Summary of the Utility Model

[0004] To solve the above problems, this application provides a battery. By specifically optimizing the structure of the battery and designing the stacking direction of the electrode sheets in the first electrode core of the battery to intersect with the stacking direction of the electrode sheets in the second electrode core, the heat inside the battery can diffuse from all around the battery, thereby improving the heat dissipation effect and the service life of the battery. In addition, this application also provides an electrical device equipped with this battery, which specifically includes the following solutions:

[0005] In a first aspect, this application provides a battery, which includes a first electrode core and a second electrode core. The first electrode core includes a plurality of first electrode sheets, and the plurality of first electrode sheets are arranged along a first direction. The second electrode core includes a plurality of second electrode sheets, and the plurality of second electrode sheets are arranged along a second direction. The first direction intersects with the second direction.

[0006] The battery of this application sets the first electrode core and the second electrode core as the battery core, which is used as the main body for generating or storing electrical energy. By arranging the plurality of first electrode sheets in the first electrode core along the first direction, and at the same time arranging the plurality of second electrode sheets in the second electrode core along the second direction, the heat inside the battery is discharged from the gaps between adjacent two first electrode sheets and the gaps between adjacent two second electrode sheets, so that heat dissipation can be carried out in multiple directions of the battery, thereby improving the heat dissipation effect, the electrochemical performance and the service life of the battery.

[0007] In one embodiment, the first direction is perpendicular to the second direction.

[0008] In one embodiment, the first electrode core and the second electrode core are arranged along the first direction.

[0009] In this embodiment, the first pole core and the second pole core are arranged along a first direction, that is, the second pole core is stacked on the first pole core, or it can be understood that multiple second pole pieces in the second pole core are all arranged on the same side surface of the same first pole piece in the first pole core, so that there are gaps for heat dissipation between adjacent two first pole pieces and between adjacent two second pole pieces in a direction perpendicular to the first direction; and in the first direction, there is a gap for heat dissipation between adjacent two second pole pieces, so that five surfaces of the first pole core and the second pole core of the battery can achieve heat dissipation, thereby improving the heat dissipation effect.

[0010] In one embodiment, multiple first pole pieces and multiple second pole pieces both extend along a third direction, and the third direction intersects with the first direction and the second direction respectively.

[0011] In this embodiment, based on the arrangement directions of the multiple first pole pieces and the multiple second pole pieces intersecting, by setting both the multiple first pole pieces and the multiple second pole pieces to extend along the third direction, while ensuring the heat dissipation effect of the battery, the energy density of the battery can also be ensured, and it is beneficial to lead out the electric energy in the first pole pieces and the second pole pieces.

[0012] In one embodiment, the battery includes a housing, a first pole column and a second pole column. The first pole core and the second pole core are received in the housing. Along the third direction, a first pole tab and a second pole tab are respectively provided at opposite ends of the first pole core, and a third pole tab and a fourth pole tab are respectively provided at opposite ends of the second pole core. The first pole tab and the third pole tab are located on the same side of the housing. The first pole column and the second pole column are respectively arranged on opposite sides of the housing along the third direction. The first pole column partially extends into the housing and is electrically connected to the first pole tab and the third pole tab, and the second pole column partially extends into the housing and is electrically connected to the second pole tab and the fourth pole tab.

[0013] In one embodiment, the first pole column includes a first sub-pole column and a second sub-pole column, the second pole column includes a third sub-pole column and a fourth sub-pole column, the first sub-pole column and the second sub-pole column are respectively connected to the first pole tab and the third pole tab, and the third sub-pole column and the fourth sub-pole column are respectively connected to the second pole tab and the fourth pole tab.

[0014] In this embodiment, by setting the first pole column to include a first sub-pole column and a second sub-pole column, and the second pole column to include a third sub-pole column and a fourth sub-pole column, using the first sub-pole column and the second sub-pole column to connect to the first pole tab and the third pole tab, and using the third sub-pole column and the fourth sub-pole column to connect to the second pole tab and the fourth pole tab, so that each sub-pole column is connected to one pole tab, thereby avoiding the situation that the same pole column connects two pole tabs resulting in relatively high local heat and affecting the electrochemical performance of the battery.

[0015] In one embodiment, the battery includes a first connecting piece and a second connecting piece. The first connecting piece and the second connecting piece are arranged on opposite sides of the housing along a third direction. The first connecting piece is connected to a first sub-pole column and a second sub-pole column, and the second connecting piece is connected to a third sub-pole column and a fourth sub-pole column.

[0016] In this embodiment, by providing a first connecting piece and a second connecting piece that are arranged on opposite sides of the housing along a third direction in the battery, and connecting the first sub-pole column and the second sub-pole column in the first pole core and the second pole core on the same side of the battery to the first connecting piece, and connecting the third sub-pole column and the fourth sub-pole column to the second connecting piece, the first pole core and the second pole core are connected in parallel.

[0017] In one embodiment, the first pole core and the second pole core are arranged along a first direction, and the distance between the two second pole pieces in the second pole core that are farthest apart in a second direction is equal to the width of any first pole piece in the first pole core along the second direction.

[0018] In one embodiment, an insulating layer is provided between the first pole core and the second pole core, and the insulating layer is used to achieve insulation protection between the first pole core and the second pole core.

[0019] In this embodiment, by providing an insulating layer between the first pole core and the second pole core to prevent the first pole core and the second pole core from contacting and causing a short circuit, the normal operation of the battery can be ensured.

[0020] In a second aspect, the present application provides an electrical device, which includes a functional module and the battery in any embodiment of the first aspect of the present application. The battery is electrically connected to the functional module to supply power to the functional module.

[0021] It can be understood that since the electrical device provided in the second aspect of the present application uses the battery provided in the first aspect of the present application, it also has all the beneficial effects that any embodiment provided in the first aspect of the present application may have. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the battery provided in an embodiment of the present application;

[0024] Figure 2 It is a schematic structural diagram of the first pole core and the second pole core provided in an embodiment of the present application;

[0025] Figure 3 The side view of the battery provided in an embodiment of the present application;

[0026] Figure 4 The side view of the battery provided in the prior art;

[0027] Figure 5 The top view of the battery provided in an embodiment of the present application;

[0028] Figure 6 The side view of the battery provided in another embodiment of the present application;

[0029] Figure 7 The side view of the battery provided in yet another embodiment of the present application;

[0030] Figure 8 The structural schematic diagram of the battery provided in another embodiment of the present application.

[0031] Reference numerals in the drawings: 100 - battery; 10 - housing; 20 - battery cell; 30 - first pole core; 40 - second pole core; 50 - pole piece; 51 - first pole piece; 52 - second pole piece; 61 - first pole column; 62 - second pole column; 63 - sub - pole column; 611 - first sub - pole column; 612 - second sub - pole column; 621 - third sub - pole column; 622 - fourth sub - pole column; 71 - first pole tab; 72 - second pole tab; 73 - third pole tab; 74 - fourth pole tab; 80 - connecting piece; 81 - first connecting piece; 82 - second connecting piece; 90 - insulating layer; 001 - first direction; 002 - second direction; 003 - third direction.

[0032] Prior art: 100'- battery'; 50'- pole piece'. Detailed implementation manners

[0033] For the convenience of understanding the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0034] The description of the following embodiments refers to the accompanying drawings for exemplifying specific embodiments in which the present application can be implemented. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in the present application, unless otherwise specified, include both direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0035] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "mount", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations. It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include", "may include", "comprise", or "may comprise" used in the present application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit the existence of one or more other functions, operations, elements, etc. In addition, the term "include" or "comprise" means the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and does not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and is intended to cover non-exclusive inclusion.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0037] It should be noted in advance that the electrical equipment involved in this application includes a functional module and a battery. Among them, the battery is used to supply electrical energy to the functional module. Specifically, in one embodiment, the electrical equipment may include a vehicle, and the battery provided in this application can be applied to the vehicle. The battery is fixed to the vehicle body and is used to supply electrical energy to various functional modules of the vehicle. For example, the battery can be used for the starting, navigation, and working power requirements of the vehicle during driving. In other embodiments, the battery can not only be used as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. Among them, the vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc.

[0038] It can be understood that the battery described in the embodiments of this application is not limited to being applied to vehicles. The battery provided in this application can also be applied to, but not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc., and this application does not make special limitations on this.

[0039] Please refer to Figure 1 、 Figure 2 and Figure 3 where Figure 1 is a schematic structural diagram of the battery 100 provided in an embodiment of this application; Figure 2 is a schematic structural diagram of the first electrode core 30 and the second electrode core 40 provided in an embodiment of this application; Figure 3 is a side view of the battery 100 provided in an embodiment of this application.

[0040] As Figures 1 to 3 shown, in one embodiment, the battery 100 provided in this application is a square battery, and the battery 100 includes a housing 10, an electrolyte (not shown in the figure), and an electrode assembly 20. The electrode assembly 20 and the electrolyte are both accommodated in the housing 10. The electrode assembly 20 is composed of a plurality of electrode sheets 50 stacked, specifically, the electrode assembly 20 includes a first electrode core 30 and a second electrode core 40. The first electrode core 30 and the second electrode core 40 are arranged along the first direction 001, and the first electrode core 30 and the second electrode core 40 are relatively fixed to each other. The first electrode core 30 includes a plurality of first electrode sheets 51, and the plurality of first electrode sheets 51 are stacked and arranged along the first direction 001; the second electrode core 40 includes a plurality of second electrode sheets 52, and the plurality of second electrode sheets 52 are stacked and arranged along the second direction 002. The first direction 001 intersects with the second direction 002. Specifically, in this embodiment, the first direction 001 can be perpendicular to the second direction 002. Among them, the first direction 001 can be the thickness direction of the battery 100, and the second direction 002 can be the width direction of the battery 100.

[0041] The battery 100 of the present application is provided with a housing 10 for accommodating and fixing the battery cell 20 and containing the electrolyte. The battery cell 20 is provided as the main body for generating or storing electrical energy, and the electrolyte can provide some active ions for the battery cell 20 and also provide an ion channel for the battery cell 20 to facilitate the flow of ions in the electrode plate 50, thereby generating electrical energy.

[0042] In the battery 100 of the present application, the first electrode core 30 and the second electrode core 40 are relatively fixed to limit the relative position between the first electrode core 30 and the second electrode core 40, avoiding the internal structure of the battery 100 from being easily collapsed during charging and expansion, which affects the performance of the battery 100 of the present application. As Figure 4 shown, Figure 4 FIG. is a side view of the battery '100' provided in the prior art. In the prior art, multiple electrode plates '50' are stacked along the thickness direction of the battery '100', so that the heat inside the battery '100' can only be discharged from the gaps between the multiple electrode plates '50'. When taking the thickness direction of the battery '100' as the up and down direction as an example, the heat inside the battery '100' in the prior art can only be discharged from the front, back, left, and right four directions of the battery '100'. In the present application, multiple first electrode plates 51 in the first electrode core 30 are arranged along the first direction 001. Exemplarily, the first direction 001 can be the up and down direction. At the same time, multiple second electrode plates 52 in the second electrode core 40 are arranged along the second direction 002. The heat inside the battery 100 can be discharged from the gaps between two adjacent first electrode plates 51 and the gaps between two adjacent second electrode plates 52, so that at least the front, back, left, right, and up five directions of the battery 100 can dissipate heat. That is, compared with the prior art, the present application adds at least the upper direction of the battery 100 for heat dissipation, thereby improving the heat dissipation performance in the thickness direction of the battery 100, further improving the heat dissipation effect, and improving the electrochemical performance and service life of the battery 100 of the present application. In addition, the electrolyte can also penetrate into the battery 100 from at least the front, back, left, right, and up multiple directions, so as to realize uniform infiltration of the electrode plate 50 and improve the performance of the battery 100.

[0043] Furthermore, when the battery 100 undergoes thermal runaway, the gas generated inside the battery cell 20 can be discharged from the thickness direction of the battery 100, that is, from the first direction 001, reducing the exhaust resistance, thereby reducing the risk of the battery 100 bulging in the thickness direction and causing the housing 10 to rupture, that is, reducing the risk of explosion of the battery 100 of the present application.

[0044] It should be noted that the perpendicularity of the first direction 001 and the second direction 002 in the above embodiments is only an exemplary introduction. That is, in other embodiments, the first direction 001 and the second direction 002 may not be perpendicular, and only need to intersect, which can also improve the heat dissipation performance in the thickness direction of the battery 100. The present application does not make special limitations on this.

[0045] In the above embodiments, the first electrode core 30 and the second electrode core 40 are arranged along the first direction 001. That is, the arrangement direction of the first electrode core 30 and the second electrode core 40 is the same as the arrangement direction of the plurality of first electrode sheets 51, and the arrangement direction of the first electrode core 30 and the second electrode core 40 is the same as the thickness direction of the first electrode sheet 51. It can also be understood that each of the second electrode sheets 52 in the second electrode core 40 is disposed on the upper surface of the first electrode sheet 51 that is located at the uppermost position along the first direction 001 in the first electrode core 30.

[0046] It can be understood that in this embodiment, the first electrode core 30 and the second electrode core 40 are arranged along the first direction 001, so that there are gaps for heat dissipation between adjacent two first electrode sheets 51 and between adjacent two second electrode sheets 52 in the direction perpendicular to the first direction 001; and in the first direction 001, there are gaps for heat dissipation between adjacent two second electrode sheets 52, so that the front, rear, left, and right four surfaces of the first electrode core 30 and the front, rear, and upper three surfaces of the second electrode core 40 can all dissipate heat. From the overall view of the battery 100, that is, the front surface, rear surface, left surface, right surface, and upper surface of the battery 100, these five surfaces can all achieve heat dissipation, thereby improving the heat dissipation effect.

[0047] It should be noted that the relative positions of the first electrode core 30 and the second electrode core 40 in the above embodiments are only an exemplary introduction, and do not represent the relative positions of the first electrode core 30 and the second electrode core 40 in other embodiments of the present application. For example, in another embodiment, each of the first electrode sheets 51 in the first electrode core 30 is disposed on the front surface of the second electrode sheet 52 that is located at the foremost position along the second direction 002 in the second electrode core 40, and the heat dissipation effect can also be improved.

[0048] Please refer to Figure 5 the top view of the battery 100 provided in an embodiment of the present application as shown.

[0049] As Figures 1 to 5As shown, in one embodiment, the stacking direction of the plurality of first pole pieces 51 is the same as the arrangement direction of the first pole core 30 and the second pole core 40, that is, they are all arranged along the first direction 001. The plurality of second pole pieces 52 are arranged along the second direction 002, and the plurality of first pole pieces 51 and the plurality of second pole pieces 52 both extend along the third direction 003. The third direction 003 intersects the first direction 001 and the second direction 002 respectively. Specifically, in this embodiment, the third direction 003 is perpendicular to the first direction 001 and the second direction 002 respectively. The third direction 003 may be the length direction of the battery 100.

[0050] It can be understood that in this embodiment, based on the fact that the arrangement direction of the plurality of first pole pieces 51 is perpendicular to the arrangement direction of the plurality of second pole pieces 52, by arranging the plurality of first pole pieces 51 and the plurality of second pole pieces 52 to both extend along the third direction 003, while ensuring the heat dissipation effect of the battery 100, the energy density of the battery 100 can also be ensured, and it is beneficial to lead out the electric energy in the first pole pieces 51 and the second pole pieces 52. In addition, the number of the required second pole pieces 52 can be reduced, thereby reducing the assembly difficulty.

[0051] It should be noted that the extension directions of the plurality of first pole pieces 51 and the plurality of second pole pieces 52 in the above embodiment are only an exemplary introduction and do not represent the extension directions of the plurality of first pole pieces 51 and the plurality of second pole pieces 52 in other embodiments of the present application. That is, the extension directions of the plurality of first pole pieces 51 and the plurality of second pole pieces 52 of the present application can be adaptively adjusted according to the actual application scenario. For example, in another embodiment, the plurality of first pole pieces 51 are arranged along the first direction 001, and the plurality of second pole pieces 52 can be arranged along the third direction 003. At this time, the plurality of first pole pieces 51 extend along the third direction 003, and the plurality of second pole pieces 52 can extend along the second direction 002, and the heat dissipation effect of the battery 100 and the energy density of the battery 100 can also be ensured.

[0052] Please refer to Figure 6 , Figure 6 which is a side view of the battery 100 provided in another embodiment of the present application.

[0053] As Figures 1 to 6As shown, in one embodiment, the battery 100 includes a housing 10, a first terminal 61 and a second terminal 62. The first electrode core 30 and the second electrode core 40 are both received in the housing 10. Along the third direction 003, a first tab 71 and a second tab 72 are respectively provided at opposite ends of the first electrode core 30, and a third tab 73 and a fourth tab 74 are respectively provided at opposite ends of the second electrode core 40. Among them, the first tab 71 and the third tab 73 are both located on one side of the housing 10 along the third direction 003, and the second tab 72 and the fourth tab 74 are both located on the other side of the housing 10 along the third direction 003. In this embodiment, the first tab 71 and the third tab 73 can be positive tabs, and the second tab 72 and the fourth tab 74 can be negative tabs. The first terminal 61 and the second terminal 62 can be arranged on opposite sides of the housing 10 along the third direction 003 and extend into the housing 10 toward the electrode core side along the third direction 003.

[0054] Specifically, the first terminal 61 can be set as the positive terminal, and the second terminal 62 can be set as the negative terminal. The first terminal 61 and the second terminal 62 are arranged on opposite sides of the housing 10 along the third direction 003. The first terminal 61 partially extends into the housing 10 and is electrically connected to the first tab 71 and the third tab 73, and the second terminal 62 partially extends into the housing 10 and is electrically connected to the second tab 72 and the fourth tab 74. Through the cooperation between the first terminal 61 and the first tab 71 and the third tab 73, and the cooperation between the second terminal 62 and the second tab 72 and the fourth tab 74, the electrical energy in the first electrode core 30 and the second electrode core 40 is led out.

[0055] Furthermore, the first terminal 61 includes a first sub-terminal 611 and a second sub-terminal 612. The first sub-terminal 611 and the second sub-terminal 612 are arranged at intervals along the first direction 001, and the first sub-terminal 611 is arranged and connected at a position corresponding to the first tab 71, and the second sub-terminal 612 is arranged and connected at a position corresponding to the third tab 73. The second terminal 62 includes a third sub-terminal 621 and a fourth sub-terminal 622. The third sub-terminal 621 and the fourth sub-terminal 622 are arranged at intervals along the first direction 001, and the third sub-terminal 621 is arranged and connected at a position corresponding to the second tab 72, and the fourth sub-terminal 622 is arranged and connected at a position corresponding to the fourth tab 74.

[0056] It can be understood that in this embodiment, by connecting the first tab 71 of the first electrode core 30 and the third tab 73 of the second electrode core 40 to the first sub-pole column 611 and the second sub-pole column 612 respectively, and connecting the second tab 72 of the first electrode core 30 and the fourth tab 74 of the second electrode core 40 to the third sub-pole column 621 and the fourth sub-pole column 622 respectively, the electric energy of the battery cell 20 is led out by the cooperation of multiple sub-pole columns 63 and multiple tabs, thereby reducing the local temperature rise at the tabs, which is beneficial to improving the electrochemical performance of the battery 100 and extending the service life of the battery 100.

[0057] It should be noted that the structures of the first pole column 61 and the second pole column 62 in the above embodiment are only introduced as an example. For example, in Figure 7 the side view of the battery 100 provided in another embodiment of the present application shown, both the first pole column 61 and the second pole column 62 in the pole columns of the battery 100 only include sub-pole columns 63. Or it can be understood that the first sub-pole column 611 and the second sub-pole column 612 located on the same side of the first electrode core 30 and the second electrode core 40 are integrally provided, and the third sub-pole column 621 and the fourth sub-pole column 622 are integrally provided. In this embodiment, the sub-pole column 63 is located at the connection of the first electrode core 30 and the second electrode core 40, and the diameter of the sub-pole column 63 is greater than the shortest distance between two tabs on the same side of the first electrode core 30 and the second electrode core 40. That is, in this embodiment, the connection of two tabs on the same side of the first electrode core 30 and the second electrode core 40 can be realized by using the sub-pole column 63, and the electric energy of the battery cell 20 can also be led out.

[0058] Please cooperate with Figure 8 , Figure 8 which is a schematic structural diagram of the battery 100 provided in another embodiment of the present application.

[0059] As Figure 8 shown, in one embodiment, the battery 100 of the present application includes a first connection piece 81 and a second connection piece 82. The first connection piece 81 and the second connection piece 82 are located outside the housing 10 and are arranged on opposite sides of the housing 10 along the third direction 003. The first connection piece 81 is connected to the first sub-pole column 611 and the second sub-pole column 612, and the second connection piece 82 is connected to the third sub-pole column 621 and the fourth sub-pole column 622.

[0060] It can be understood that in this embodiment, by providing the first connection piece 81 and the second connection piece 82 arranged on opposite sides of the battery cell 20 along the third direction 003 in the battery 100, and connecting the first connection piece 81 to the first sub-pole column 611 and the second sub-pole column 612, and connecting the second connection piece 82 to the third sub-pole column 621 and the fourth sub-pole column 622, the first electrode core 30 and the second electrode core 40 are thus connected in parallel.

[0061] In one embodiment, the battery 100 includes a voltage detector (not shown in the figure), which is electrically connected to one of the connecting pieces 80 and is used to detect the pressure difference of the battery 100. In this embodiment, based on the parallel connection of the first electrode core 30 and the second electrode core 40 in the battery 100, when any one of the first electrode core 30 and the second electrode core 40 undergoes thermal runaway or short circuit, the other will discharge the runaway or short-circuited electrode core through the connecting piece 80. The current passes through the connecting piece 80 and forms a continuous voltage difference on both sides of the connecting piece 80 (between the sub-terminal posts 63 of the first electrode core 30 and the second electrode core 40). The voltage detector can achieve a rapid alarm for the thermal runaway or short circuit of the battery 100 by measuring the voltage difference on both sides of the connecting piece 80, so as to timely handle the abnormal situation of the battery 100.

[0062] In one embodiment, the distance between the two second electrode plates 52 that are farthest apart in the second direction 002 in the second electrode core 40 is equal to the width of the first electrode plate 51 in the first electrode core 30 along the second direction 002, so as to ensure the energy density of the battery 100 while making the battery 100 have a regular shape.

[0063] In one embodiment, there is a first separator (not shown in the figure) between two adjacent first electrode plates 51, and the distance between two adjacent first electrode plates 51 is greater than or equal to the thickness of the first separator. It can be understood that in this embodiment, the first separator is arranged between two adjacent first electrode plates 51 to avoid short circuit caused by contact between two adjacent first electrode plates 51. At the same time, the distance between two adjacent first electrode plates 51 is set to be greater than or equal to the thickness of the first separator to ensure that there is a gap between the two first electrode plates 51, so that the heat inside the first electrode core 30 can be discharged from the gap.

[0064] In one embodiment, there is a second separator (not shown in the figure) between two adjacent second electrode plates 52, and the distance between two adjacent second electrode plates 52 is greater than or equal to the thickness of the second separator. It can be understood that in this embodiment, the second separator is arranged between two adjacent second electrode plates 52 to avoid short circuit caused by contact between two adjacent second electrode plates 52. At the same time, the distance between two adjacent second electrode plates 52 is set to be greater than or equal to the thickness of the second separator to ensure that there is a gap between the two second electrode plates 52, so that the heat inside the second electrode core 40 can be discharged from the gap.

[0065] Please refer back to Figure 2 , in one embodiment, an insulating layer 90 is provided between the first electrode core 30 and the second electrode core 40, and the insulating layer 90 is used to achieve insulation protection between the first electrode core 30 and the second electrode core 40. It can be understood that in this embodiment, by providing the insulating layer 90 between the first electrode core 30 and the second electrode core 40, short circuit caused by contact between the first electrode core 30 and the second electrode core 40 can be avoided, so as to ensure the normal operation of the battery 100.

[0066] Furthermore, the insulating layer 90 is arranged in the form of an insulating bracket or an insulating ring. The insulating bracket or the insulating ring can not only separate the first pole core 30 and the second pole core 40, but also provide a heat dissipation space for the pole core, thereby further improving the heat dissipation effect.

[0067] It should be noted that the structure of the battery cell 20 in the above-mentioned embodiment is only introduced as an example, that is, the structure of the battery cell 20 in the battery 100 can be adaptively adjusted according to the actual application scenario. The battery cell 20 may not only include the first pole core 30 and the second pole core 40, but also include a third pole core, a fourth pole core, etc., and the present application does not make special limitations thereto.

[0068] It should be understood that the terms "first", "second", etc. are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] It should be understood that the application of the present application is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the claims appended to the present application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A battery, characterized in that: It includes a first pole core and a second pole core, the first pole core includes a plurality of first pole pieces, the plurality of first pole pieces are arranged along a first direction, the second pole core includes a plurality of second pole pieces, the plurality of second pole pieces are arranged along a second direction, and the first direction intersects with the second direction.

2. The battery according to claim 1, characterized in that The first pole core and the second pole core are arranged along the first direction.

3. The battery according to claim 1, characterized in that The plurality of first pole pieces and the plurality of second pole pieces all extend along a third direction, and the third direction intersects with the first direction and the second direction respectively.

4. The battery according to claim 3, characterized in that The battery includes a shell, a first pole and a second pole, the first pole core and the second pole core are accommodated in the shell, and along the third direction, the first pole core is provided with a first pole ear and a second pole ear at opposite ends thereof, respectively, and the second pole core is provided with a third pole ear and a fourth pole ear at opposite ends thereof, and the first pole ear and the third pole ear are located on the same side of the shell, the first pole column and the second pole column are arranged on opposite sides of the shell along the third direction, the first pole column partially extends into the shell and is electrically connected to the first pole ear and the third pole ear, and the second pole column partially extends into the shell and is electrically connected to the second pole ear and the fourth pole ear.

5. The battery according to claim 4, characterized in that The first pole includes a first sub-pole and a second sub-pole, the second pole includes a third sub-pole and a fourth sub-pole, the first sub-pole and the second sub-pole are connected to the first pole lug and the third pole lug respectively, and the third sub-pole and the fourth sub-pole are connected to the second pole lug and the fourth pole lug respectively.

6. The battery according to claim 5, characterized in that The battery includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged on opposite sides of the shell along the third direction, the first connecting plate is connected to the first sub-pole and the second sub-pole, and the second connecting plate is connected to the third sub-pole and the fourth sub-pole.

7. The battery according to any one of claims 3 to 6, characterized in that: The first direction is perpendicular to the second direction.

8. The battery according to claim 7, characterized in that The first pole core and the second pole core are arranged along the first direction, and the distance between two second pole pieces in the second pole core that are farthest apart in the second direction is equal to the width of any first pole piece in the first pole core along the second direction.

9. The battery according to any one of claims 1 to 6, characterized in that: An insulating layer is provided between the first pole core and the second pole core, and the insulating layer is used to achieve insulation protection between the first pole core and the second pole core.

10. An electrical device, characterized in that: It comprises a functional module and the battery according to any one of claims 1 to 9, wherein the battery is electrically connected to the functional module to supply power to the functional module.

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