High-power soft package battery capable of improving heat dissipation efficiency based on current heat effect

Abstract

The utility model discloses a high-power soft package battery capable of improving heat dissipation efficiency based on a current heat effect, which relates to the technical field of batteries, and comprises a battery body, two first tabs, at least two second tabs and a conductive connecting piece, one ends of the two first tabs are electrically connected with the positive electrode and the negative electrode of the battery body respectively, and the other ends extend out of the outer surface of the battery body; the at least two second tabs are arranged in the battery body; the second tab is connected with the first tab through a conductive connecting piece, and current and heat of the first tab are conducted to the second tab through the conductive connecting piece; the current and the heat of the soft package battery provided by the utility model are conducted to the second tab from the first tab through the conductive connecting piece, so that the current distribution uniformity and the heat dissipation area of the soft package battery are improved, and the heat dissipation effect and the performance of the soft package battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a high-power soft-pack battery that improves heat dissipation efficiency based on current thermal effect. Background Art

[0002] With the rapid development of new energy technologies, high-power soft-pack batteries have been widely used in electric vehicles, mobile devices, etc. due to their high energy density and small structural size. However, when high-power soft-pack batteries are used and discharged, the high heat generated by the battery can easily cause the internal temperature of the battery to rise, thus affecting the performance and safety of the battery.

[0003] Existing high-power soft-pack batteries have tabs connected to the positive and negative electrodes, and the tabs extend to the outside of the battery, thereby increasing the heat dissipation area of ​​the battery and improving the heat dissipation effect. However, when high-power soft-pack batteries are discharged at high power, it can be seen from the thermal effect of the current that under the same conductor material and size conditions, the temperature of the conductor will increase with the increase of the current. At the same time, since the current is concentrated at the tabs of the positive and negative electrodes of the soft-pack battery, the current is unevenly distributed in the soft-pack battery. The limited heat dissipation area of ​​the tabs cannot dissipate the heat accumulated inside the battery in time, aggravating the heat accumulation at the tabs, causing the temperature of the battery to continue to rise, affecting the performance and safety of the battery. Utility Model Content

[0004] The main purpose of the utility model is to propose a high-power soft-pack battery that improves heat dissipation efficiency based on current thermal effect, aiming to solve the problems of uneven current distribution and poor heat dissipation effect of existing soft-pack batteries.

[0005] To achieve the above-mentioned purpose, the utility model proposes a high-power soft-pack battery that improves heat dissipation efficiency based on the thermal effect of current, comprising a battery body, two first pole ears, at least two second pole ears and a conductive connector; one end of the two first pole ears is electrically connected to the positive pole and the negative pole of the battery body respectively, and the other end extends out of the outer surface of the battery body; at least two second pole ears are arranged in the battery body; the second pole ear is electrically connected to the first pole ear through the conductive connector, and the current and heat of the first pole ear are conducted to the second pole ear through the conductive connector.

[0006] In one embodiment, the two first pole tabs are located on the same side of the battery body, and two second pole tabs are provided, and the two second pole tabs are respectively located on two sides of the battery body adjacent to the first pole tabs.

[0007] In one embodiment, two of the first pole ears are located on the same side of the battery body, and four second pole ears are provided, wherein two of the second pole ears are located on the side of the battery body opposite to the first pole ears, and are respectively connected to the two first pole ears, and the remaining two of the second pole ears are respectively located on both sides of the battery body adjacent to the first pole ears, and are respectively connected to the two first pole ears through the conductive connecting member.

[0008] In one embodiment, the two first electrode tabs are respectively located on two sides of the battery body.

[0009] In one embodiment, the two first pole ears are respectively located on opposite sides of the battery body and are staggered in a direction perpendicular to the side of the battery body. Two second pole ears are provided, and the two second pole ears are respectively located on both sides of the battery body adjacent to the first pole ears and are respectively connected to the two first pole ears.

[0010] In one embodiment, the two first pole ears are respectively located on opposite sides of the battery body and are staggered in a direction perpendicular to the side of the battery body. Four second pole ears are provided, two of which are respectively located on both sides of the battery body adjacent to the first pole ears and are respectively connected to the two first pole ears, and the remaining two second pole ears are respectively located on both sides of the battery body provided with the two first pole ears and are respectively connected to the adjacent first pole ears.

[0011] In one embodiment, the two first pole tabs are respectively located on two opposite sides of the battery body and are arranged opposite to each other. Two second pole tabs are provided, and the two second pole tabs are respectively located on two sides of the battery body adjacent to the first pole tab and are respectively connected to the two first pole tabs.

[0012] In one embodiment, two of the first pole ears are respectively located on two opposite sides of the battery body and are arranged opposite to each other. Four second pole ears are provided, two of which are located on one side of the battery body adjacent to one of the first pole ears and are respectively connected to the two first pole ears, and the remaining two of the second pole ears are located on the other side of the battery body adjacent to one of the first pole ears and are respectively connected to the two first pole ears.

[0013] In one embodiment, the conductive connecting member is made of a material with high thermal conductivity such as copper or aluminum.

[0014] In one embodiment, the soft-pack battery further includes an edge sealing member, and the edge sealing member is sealed on the outer side surface of the battery body where the first electrode tab is provided.

[0015] The high-power soft-pack battery for improving heat dissipation efficiency based on the current thermal effect proposed in the technical solution of the utility model includes a battery body, two first pole ears, at least two second pole ears and a conductive connector, wherein the battery body has a positive electrode and a negative electrode, one end of the two first pole ears is respectively connected to the positive electrode and the negative electrode of the battery body, and the other end is extended to the outside of the battery body, so that the first pole ear increases the heat dissipation area of ​​the soft-pack battery while improving the convenience of connecting the external device to the positive and negative electrodes of the battery body. Further, by arranging the second pole ear and the conductive connector in the battery body, and electrically connecting the second pole ear to the first pole ear through the conductive connector, the current at the first pole ear can be conducted to the second pole ear through the conductive connector, thereby achieving the uniformity of the internal current density of the high-power soft-pack battery, thereby reducing the occurrence of heat accumulation and temperature rise problems caused by large current in the first pole ear. In addition, while conducting the current, the conductive connector can also conduct the heat at the first pole ear from the first pole ear to the second pole ear through the conductive connector, thereby further improving the heat dissipation efficiency of the soft-pack battery and improving the reliability of the soft-pack battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of the first embodiment of a high-power soft-pack battery for improving heat dissipation efficiency based on current thermal effect provided by the utility model;

[0018] Figure 2 A schematic structural diagram of a second embodiment of a high-power soft-pack battery for improving heat dissipation efficiency based on current thermal effect provided by the utility model;

[0019] Figure 3 A schematic structural diagram of a third embodiment of a high-power soft-pack battery for improving heat dissipation efficiency based on current thermal effect provided by the utility model;

[0020] Figure 4 A schematic structural diagram of a fourth embodiment of a high-power soft-pack battery for improving heat dissipation efficiency based on current thermal effect provided by the utility model;

[0021] Figure 5 A schematic structural diagram of a fifth embodiment of a high-power soft-pack battery for improving heat dissipation efficiency based on current thermal effect provided by the utility model;

[0022] Figure 6This is a schematic structural diagram of the sixth embodiment of the high-power soft-pack battery provided by the utility model for improving heat dissipation efficiency based on the current thermal effect.

[0023] Description of Figure Numbers:

[0024] 1. High-power soft-pack battery with improved heat dissipation efficiency based on current thermal effect; 10. Battery body;

[0025] 20. First pole ear; 30. Second pole ear; 40. Conductive connector; 50. Edge sealing member.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] The utility model provides a high-power soft-pack battery 1 which improves heat dissipation efficiency based on the current thermal effect.

[0031] Combination Figure 1-Figure 6As shown, in one embodiment of the utility model, the high-power soft-pack battery 1 based on the current thermal effect to improve the heat dissipation efficiency includes a battery body 10, two first pole tabs 20, at least two second pole tabs 30 and a conductive connector 40; one end of the two first pole tabs 20 is electrically connected to the positive electrode and the negative electrode of the battery body 10 respectively, and the other end extends out of the outer surface of the battery body 10; at least two second pole tabs 30 are both arranged in the battery body 10; the second pole tab 30 is connected to the first pole tab 20 through the conductive connector 40, and the heat of the first pole tab 20 is conducted to the second pole tab 30 through the conductive connector 40.

[0032] In this embodiment, the positive electrode and the negative electrode of the battery body 10 are interfaces for charging and discharging the battery body 10, and the first pole ear 20 is a metal conductor connected from the positive electrode interface and the negative electrode interface of the battery body 10. The material of the first pole ear 20 can be aluminum, nickel or copper and other materials, which have good electrical conductivity and high thermal conductivity, and are convenient for the electrical connection and heat dissipation of the battery body 10 and external equipment. The cross-sectional shape of the battery body 10 is rectangular, one end of the first pole ear 20 is located inside the battery body 10, and the other end extends to the outside of the battery body 10. The shape of the first pole ear 20 can also be set to a rectangular shape to increase the heat dissipation area of ​​the first pole ear 20, and at the same time facilitate the first pole ear 20 to be arranged on the outside of the battery body 10.

[0033] Furthermore, since the soft-pack battery is a high-power soft-pack battery, a large current will be generated during high-power charging and discharging operations. Therefore, the current density at the two first pole ears 20 connected to the positive and negative poles of the battery body 10 is high, while the current density in other places of the battery body is low, resulting in an uneven distribution of the overall current density of the battery body. Therefore, under long-term operation, the heat of the first pole ear 20 is likely to increase, which will also affect the overall performance of the battery. Therefore, the present application also provides a conductive connector 40 and a second pole ear 30, and the second pole ear 30 is electrically connected to the first pole ear 20 through the conductive connector 40, so that the current at the first pole ear 20 can be conducted to the second pole ear 30 through the conductive connector 40, and the second pole ear 30 is arranged inside the battery body 10, thereby achieving uniformity of the internal current density of the high-power soft-pack battery. From the thermal effect principle of electric current, it can be known that when the current density decreases, the heat generated by the current flowing through the conductor will also decrease, so that the soft-pack battery can work in a high-power state for a long time, keeping the first pole ear 20 and the battery body 10 at a lower temperature, thereby reducing the heat accumulation and temperature rise problems caused by high current in the first pole ear, and improving the performance and reliability of the battery.

[0034] The material and size of the conductive connector 40 can be set according to the output power of the soft-pack battery 1 to ensure that the current of the first pole ear 20 is more reliably conducted to the second pole ear 30. At the same time, the second pole ear 30 and the conductive connector 40 are arranged at a position close to the outer surface of the battery body 10, which increases the effective heat dissipation area of ​​the soft-pack battery 1, so that the heat can be timely conducted to the outside through the conductive connector 40, the second pole ear 30, and the outer wall of the battery body 10, further improving the overall heat dissipation effect.

[0035] In practical applications, based on the scheme of setting a conductive connector 40 and a second pole ear 30 in the battery body 10 in the previous embodiment, in order to further improve the heat dissipation effect of the soft-pack battery and improve the uniformity of the internal current of the battery, the first pole ear 20, the second pole ear 30, and the conductive connector 40 in the high-power soft-pack battery 1 that improves the heat dissipation efficiency based on the thermal effect of current also have other structural forms, which are distinguished and explained in the following from the first embodiment to the sixth embodiment.

[0036] It is understandable that, in order to facilitate the description and understanding of the technical solution, this application will be attached Figure 1-6 The side of the battery body 10 facing upward is defined as the top surface, the side of the battery body 10 facing downward is defined as the bottom surface, the side of the battery body 10 facing left is defined as the left side surface, and the side of the battery body 10 facing right is defined as the right side surface.

[0037] First embodiment:

[0038] Combination Figure 1 As shown, in one embodiment of the present invention, two first pole tabs 20 are located on the same side of the battery body 10 , and two second pole tabs 30 are provided. The two second pole tabs 30 are respectively located on both sides of the battery body 10 adjacent to the first pole tab 20 .

[0039] In this embodiment, two first pole tabs 20 are arranged at intervals on the top surface of the battery body 10, and two second pole tabs 30 are respectively arranged on the left side and the right side of the battery body 10. One end of the two first pole tabs 20 extends to the outside of the battery body 10, and the two second pole tabs 30 are located inside the battery body 10 and extend in the direction toward the top surface and the bottom surface of the battery body 10, so that the current and heat on the first pole tab 20 are diffused to the second pole tab 30 through the conductive connector 40, thereby increasing the effective heat dissipation area of ​​the battery and improving the uniformity of current distribution. The conductive connector 40 is L-shaped, and the L-shaped conductive connector 40 is arranged near the outer surface of the battery body 10, one end of which is connected to the first pole tab 20, and the other end is connected to the second pole tab 30. The connection method can be soldering, high thermal conductivity adhesive bonding, etc., thereby reducing the thermal resistance from the conductive connector 40 to the first pole tab 20 and the conductive connector 40 to the second pole tab 30, and improving the thermal conductivity effect of the conductive connector 40.

[0040] Second embodiment:

[0041] Combination Figure 2 As shown, in one embodiment of the utility model, the two first pole tabs 20 are located on the same side of the battery body 10, and four second pole tabs 30 are provided, wherein two second pole tabs 30 are located on one side of the battery body 10 relative to the first pole tab 20, and are respectively connected to the two first pole tabs 20, and the remaining two second pole tabs 30 are respectively located on both sides of the battery body 10 adjacent to the first pole tab 20, and are respectively connected to the two first pole tabs 20 through conductive connectors 40.

[0042] In this embodiment, two first pole tabs 20 are arranged adjacently at intervals on the top surface of the battery body 10, two of the four second pole tabs 30 are arranged on the bottom surface of the battery body 10 and are arranged opposite to the two first pole tabs 20, respectively, and the other two second pole tabs 30 are arranged on the left side and right side of the battery body 10. At the same time, the shape of the conductive connector 40 is a concave shape, and the two ends of the concave conductive connector 40 are respectively connected to the first pole tab 20 on the top surface and the second pole tab 30 on the bottom surface, and the middle part is connected to the second pole tab 30 on the left side or the right side, so that the first pole tab 20 can conduct current and heat through the conductive connector 40 and the two second pole tabs 30. At the same time, since the first pole tab 20 and the second pole tab 30 are respectively arranged on the four sides of the battery body 10, the current of the first pole tab 20 is distributed around the battery body 10, and the four sides of the battery body 10 can be used for heat dissipation, thereby improving the uniformity of current distribution and heat dissipation of the battery body 10.

[0043] Combination Figure 3-Figure 6 As shown, in one embodiment of the present invention, two first tabs 20 are respectively located on two sides of the battery body 10 .

[0044] In this embodiment, the two first pole ears 20 are respectively arranged on both sides of the battery body 10, so as to facilitate the connection of the external power supply or electrical equipment to the positive and negative electrodes of the battery body 10. At the same time, the two first pole ears 20 are dispersed on both sides of the battery body 10, thereby improving the uniformity of the current distribution and the heat dissipation effect of the soft-pack battery.

[0045] Third embodiment:

[0046] Combination Figure 3 As shown, in one embodiment of the utility model, the two first pole tabs 20 are respectively located on opposite sides of the battery body 10 and are staggered in a direction perpendicular to the side of the battery body 10. Two second pole tabs 30 are provided. The two second pole tabs 30 are respectively located on both sides of the battery body 10 adjacent to the two first pole tabs 20 and are respectively connected to the two first pole tabs 20.

[0047] In this embodiment, the two first tabs 20 are located on opposite sides of the battery body 10 and are staggered up and down, which reduces the heat exchange between the two first tabs 20 due to large current, and improves the uniformity of current distribution, heat uniformity and heat dissipation efficiency of the soft-pack battery. Figure 3 It can be seen that one first pole tab 20 is located on the top surface of the battery body 10 and close to the right side surface, and the other first pole tab 20 is located on the bottom surface of the battery body 10 and close to the left side surface, so as to increase the linear distance between the two first pole tabs 20 and reduce the influence of heat superposition between the two first pole tabs 20. The two second pole tabs 30 are respectively arranged on the left side and the right side of the battery body 10 to respectively connect the first pole tab 20 located on the bottom surface of the battery body 10 and the first pole tab 20 located on the top surface of the battery body 10. The shape of the conductive connector 40 is L-shaped to match the shape of the battery body 10 and the arrangement of the first pole tab 20 and the second pole tab 30.

[0048] Fourth embodiment:

[0049] Combination Figure 4 As shown, in one embodiment of the utility model, the two first pole tabs 20 are respectively located on opposite sides of the battery body 10 and are staggered in a direction perpendicular to the side of the battery body 10. Four second pole tabs 30 are provided, two of which are respectively located on both sides of the battery body 10 adjacent to the two first pole tabs 20 and are respectively connected to the two first pole tabs 20, and the remaining two second pole tabs 30 are respectively located on both sides of the battery body 10 with the two first pole tabs 20 and are respectively connected to the adjacent first pole tabs 20.

[0050] In this embodiment, four second pole tabs 30 are provided, of which two second pole tabs 30 are respectively located on the top surface and the bottom surface of the battery body 10, that is, they are respectively arranged in parallel and adjacent to the two first pole tabs 20, and the remaining two second pole tabs 30 are respectively located on the left side and the right side of the battery body 10, and are arranged opposite to each other. The conductive connector 40 is in a concave shape, and is provided with two, of which the two ends of one conductive connector 40 are respectively connected to the second pole tab 30 located on the top surface of the battery body 10 and the first pole tab 20 located on the bottom surface of the battery body 10, and the middle part is connected to the second pole tab 30 located on the left side of the battery body 10. The two ends of the other conductive connector 40 are respectively connected to the first pole tab 20 located on the top surface of the battery body 10 and the second pole tab 30 located on the bottom surface of the battery body 10, and the middle part is connected to the second pole tab 30 located on the right side of the battery body 10. Therefore, the higher density current and heat at the first pole ear 20 can be diffused to the two second pole ears 30 through the conductive connector 40, so that the temperature and current density around the battery body 10 tend to be uniform, avoiding local high temperature adjacent to the first pole ear 20 of the battery body 10, and further improving the uniformity of temperature and current density.

[0051] Fifth embodiment:

[0052] Combination Figure 5 As shown, in one embodiment of the present invention, the two first pole tabs 20 are respectively located on opposite sides of the battery body 10 and are arranged opposite to each other, and two second pole tabs 30 are provided. The two second pole tabs 30 are respectively located on both sides of the battery body 10 adjacent to the first pole tab 20 and are respectively connected to the two first pole tabs 20.

[0053] In this embodiment, two first pole tabs 20 are arranged on opposite sides of the battery body 10, thereby improving the uniformity of the overall temperature and current distribution of the battery body 10. Further, when the cross-sectional shape of the battery body 10 is rectangular, the two first pole tabs 20 are arranged on the wide side of the battery body 10, thereby increasing the spacing between the two first pole tabs 20, thereby reducing the occurrence of local temperature rise caused by heat convergence between the two first pole tabs 20. Further, two second pole tabs 30 are respectively arranged on the long sides of the battery body 10, and a second pole tab 30 is connected to a first pole tab 20 through a conductive connector 40, so that the current and heat of the first pole tab 20 are conducted to the second pole tab 30. At the same time, the second pole tab 30 is arranged close to the first pole tab 20 connected thereto, so as to further reduce the heat convergence between the two first pole tabs 20.

[0054] Sixth embodiment:

[0055] Combination Figure 6 As shown, in one embodiment of the utility model, the two first pole tabs 20 are respectively located on two opposite sides of the battery body 10 and are arranged opposite to each other, and four second pole tabs 30 are provided, wherein two second pole tabs 30 are both located on one side of the battery body 10 adjacent to a first pole tab 20 and are respectively connected to the two first pole tabs 20, and the remaining two second pole tabs 30 are both located on the other side of the battery body 10 adjacent to a first pole tab 20 and are respectively connected to the two first pole tabs 20.

[0056] In this embodiment, two first pole tabs 20 are arranged on both sides of the battery body 10, and four second pole tabs 30 are arranged to be connected to the two first pole tabs 20, respectively, which further improves the current distribution of the first pole tab 20 on more second pole tabs 30, and at the same time, the heat of the first pole tab 20 can also be diffused to more second pole tabs 30, thereby improving the overall current distribution uniformity and heat dissipation efficiency of the battery body 10. Further, the two first pole tabs 20 are arranged on the wide sides of the battery body 10, and the four second pole tabs 30 are arranged on the long sides of the battery body 10, respectively, and two second pole tabs 30 are evenly spaced on each long side, and the second pole tabs 30 on both sides are arranged opposite to each other, thereby improving the uniformity of the temperature of the battery body 10. At this time, two conductive connectors 40 are also arranged, and their shape is concave, and the two ends are respectively connected to the two second pole tabs 30 arranged opposite to each other on both sides, and the middle part is connected to the first pole tab 20, so that the temperature of the upper and lower sides of the battery body 10 adjacent to the first pole tab 20 is more uniform.

[0057] In one embodiment of the present invention, the conductive connecting member 40 is made of copper or aluminum, a material with high thermal conductivity.

[0058] In this embodiment, the material of the second pole tab 30 can be the same as that of the first pole tab 20 to reduce processing costs, and the conductive connector 40 is made of a material with a high thermal conductivity, such as copper, aluminum, etc., to improve the efficiency of heat diffusion from the first pole tab 20 to the second pole tab 30. At the same time, the material, width and thickness of the conductive connector 40 should also match the maximum thermal conductivity of the conductive connector 40 to meet the heat dissipation requirements of the soft-pack battery during high-power charging and discharging.

[0059] In other embodiments, the two first pole ears 20 can also be arranged on two adjacent sides of the battery body 10, and the second pole ears 30 can also be set to a non-even number such as 3, 5, 7, etc., and the arrangement method can also be an asymmetric structure. As long as the current and heat of the first pole ear 20 can be transferred to the second pole ear 30, it belongs to the protection scope of the present utility model.

[0060] In an embodiment of the present invention, the soft-pack battery 1 further includes an edge sealing member 50 , and the edge sealing member 50 is sealed on the outer side of the battery body 10 where the first electrode tab 20 is provided.

[0061] In this embodiment, the edge sealer 50 is used to seal the gap between the first pole tab 20 and the outer surface of the battery body 10 to ensure the reliability of the inside of the battery body 10. It can be understood that when the first pole tab 20 is located at different sides of the battery body 10, a plurality of edge sealers 50 are also provided, and are respectively provided on the side of the battery body 10 where the first pole tab 20 is provided.

[0062] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-power soft-pack battery with improved heat dissipation efficiency based on current thermal effect, characterized in that: include: Battery body; Two first pole tabs, one end of each of the first pole tabs being electrically connected to the positive electrode and the negative electrode of the battery body respectively, and the other end of each of the first pole tabs extending out of the outer surface of the battery body; at least two second pole tabs, wherein at least two second pole tabs are disposed in the battery body; and A conductive connector, the second pole tab is electrically connected to the first pole tab through the conductive connector, and the current and heat of the first pole tab are conducted to the second pole tab through the conductive connector.

2. The high-power soft-pack battery according to claim 1, characterized in that: The two first pole tabs are located on the same side of the battery body, and two second pole tabs are provided. The two second pole tabs are respectively located on two sides of the battery body adjacent to the first pole tabs.

3. The high-power soft-pack battery according to claim 1, characterized in that: The two first pole ears are located on the same side of the battery body, and four second pole ears are provided, wherein two of the second pole ears are located on the side of the battery body opposite to the first pole ears, and are respectively connected to the two first pole ears, and the remaining two second pole ears are respectively located on both sides of the battery body adjacent to the first pole ears, and are respectively connected to the two first pole ears through the conductive connecting member.

4. The high-power soft-pack battery according to claim 1, characterized in that: The two first pole tabs are respectively located on two sides of the battery body.

5. The high-power soft-pack battery according to claim 4, characterized in that: The two first pole ears are respectively located on opposite sides of the battery body and are staggered in a direction perpendicular to the side of the battery body. Two second pole ears are provided, and the two second pole ears are respectively located on both sides of the battery body adjacent to the two first pole ears and are respectively connected to the two first pole ears.

6. The high-power soft-pack battery according to claim 4, characterized in that: The two first pole ears are respectively located on opposite sides of the battery body and are staggered in a direction perpendicular to the side of the battery body. Four second pole ears are provided, two of which are respectively located on both sides of the battery body adjacent to the first pole ears and are respectively connected to the two first pole ears, and the remaining two second pole ears are respectively located on both sides of the battery body with the two first pole ears and are respectively connected to the adjacent first pole ears.

7. The high-power soft-pack battery according to claim 4, characterized in that: The two first pole ears are respectively located on two opposite sides of the battery body and are arranged opposite to each other. Two second pole ears are provided. The two second pole ears are respectively located on two sides of the battery body adjacent to the first pole ears and are respectively connected to the two first pole ears.

8. The high-power soft-pack battery according to claim 4, characterized in that: The two first pole ears are respectively located on two opposite sides of the battery body and are arranged opposite to each other. Four second pole ears are provided, two of which are located on one side of the battery body adjacent to one of the first pole ears and are respectively connected to the two first pole ears, and the remaining two second pole ears are located on the other side of the battery body adjacent to one of the first pole ears and are respectively connected to the two first pole ears.

9. The high-power soft-pack battery according to any one of claims 1 to 8, characterized in that: The conductive connecting piece is made of copper or aluminum with high thermal conductivity.

10. The high-power soft-pack battery according to any one of claims 1 to 8, characterized in that: The soft-pack battery further includes an edge sealing member, and the edge sealing member is sealed on the outer side surface of the battery body where the first pole lug is provided.

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