Battery, battery pack and carrier

Abstract

The invention relates to the field of batteries, and discloses a battery, a battery pack and a carrier. The battery comprises a shell, the shell comprises a main body and a boss, cavities are formed in the main body and the boss, the main body is of a polygon prism structure, the boss is arranged on the end face, facing the first direction, of the main body and communicated with the main body, the boss extends in the second direction, and a gap is formed between the side face, facing the third direction, of the boss and the side face, on the same side, of the main body; the pole is arranged at one end, far away from the main body, of the boss, and one end of the pole is arranged in the boss; and the pole core is arranged in the main body, and a lug of the pole core extends into the boss and is connected with the pole column. The distance is formed between the side face of the boss and the side face of the same side of the main body, so that the distance between the pole or the tab and the side face of the boss is closer than the distance between the pole or the tab and the side face of the main body, the heat transfer path can be shortened, the heat resistance is greatly reduced, the heat conduction efficiency is improved, and the heat dissipation effect of the pole and the tab is further improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to batteries, battery packs and carriers. Background Art

[0002] With the rapid development of electric vehicles and energy storage, the performance of lithium-ion batteries as the core power source is becoming increasingly critical, especially the high-rate charging performance, which can greatly shorten the charging time and significantly improve the user experience, becoming the research focus and development direction in the industry.

[0003] However, during high-rate charging, a lot of heat will be generated inside the battery. Especially the tabs and poles become the main heat sources due to their high current density and high resistance. If the large amount of heat generated in these parts cannot be dissipated in time, it will have a serious impact on battery performance.

[0004] However, the current battery design focuses more on the overall temperature control of the battery. The cooling effect is poor for the parts that generate more heat, such as the tabs and poles. As a result, the performance of the battery is limited under high-rate charging conditions, and it is easy to cause local overheating of the battery, accelerating battery aging. Summary of the invention

[0005] In view of this, the present invention provides a battery, a battery pack and a carrier to solve or improve the problem that the battery tabs or poles are not easy to cool down.

[0006] In a first aspect, the present invention provides a battery, comprising:

[0007] The housing comprises a main body and a boss, both of which are hollow inside, the main body is a multi-prism structure, the boss is arranged on the end surface of the main body facing the first direction and is connected to the main body, the boss extends along the second direction, and there is a gap between the side surface of the boss facing the third direction and the side surface of the main body on the same side;

[0008] A pole, arranged at an end of the boss away from the main body, and one end of the pole is arranged in the boss;

[0009] The pole core is arranged in the main body, and the pole ear of the pole core extends into the boss and is connected with the pole column.

[0010] In an optional embodiment, two side surfaces of the boss facing and away from the second direction are respectively aligned with the side surfaces on the same side of the main body, and a distance exists between the side surface of the boss away from the third direction and the side surface on the same side of the main body;

[0011] Alternatively, two side surfaces of the boss facing and away from the second direction, and a side surface away from the third direction are respectively aligned with side surfaces on the same side of the main body.

[0012] In an optional embodiment, the number of the poles is two, and the two poles are both arranged on the boss;

[0013] The electrode tabs include a positive electrode tab and a negative electrode tab. Both the positive electrode tab and the negative electrode tab extend into the boss and are connected to the corresponding electrode posts.

[0014] In an optional embodiment, the end surface of the main body away from the first direction is also provided with a corresponding boss, and the bosses on both end surfaces of the main body are provided with corresponding poles;

[0015] The electrode tabs include a positive electrode tab and a negative electrode tab. The positive electrode tab and the negative electrode tab extend into the bosses on the two end surfaces of the main body respectively and are connected to the corresponding electrode posts.

[0016] In an optional embodiment, the side of the boss facing the second direction is aligned with the side of the main body on the same side, and the housing is provided with a mounting opening facing the second direction and through which the pole core can pass, a part of the mounting opening is located on the side of the main body, and another part is located on the side of the boss, and the mounting opening is closed by a sealing plate;

[0017] And / or, an end surface of the boss away from the main body is provided with an opening, and the opening is closed by a cover plate, and the pole is arranged on the cover plate.

[0018] In an optional embodiment, the battery further includes a support member, the support member is an insulating member, and the support member includes:

[0019] A first plate body, at least partially disposed in the boss, and the first plate body is disposed on the inner side of a side surface of the boss that is spaced apart from a side surface of the main body;

[0020] The second plate body is arranged between the pole core and the end surface of the main body provided with the boss, and is used to limit the pole core in a direction perpendicular to the end surface of the main body. One end of the second plate body is connected to the first plate body, and the other end extends in a direction away from the pole ear.

[0021] In an optional embodiment, the first plate body is provided with a first through hole, the second plate body is provided with a second through hole, and the first through hole is connected to the second through hole.

[0022] In an optional embodiment, the battery further includes a first insulating member, and the first insulating member is disposed in the boss;

[0023] The pole post passes through the first insulating member and penetrates through one end of the boss away from the main body. A connecting plate is provided at one end of the pole post located within the boss. The first insulating member is disposed on a side of the connecting plate away from the pole core. The pole tab is connected to a surface of the connecting plate close to the pole core. The first plate body is connected to the first insulating member.

[0024] In an alternative embodiment, the first insulating member is provided with a liquid injection hole. A connecting post is provided on a surface of the first insulating member close to the pole core. A baffle is provided at one end of the connecting post close to the pole core. The baffle is disposed opposite to the liquid injection hole.

[0025] In a second aspect, the present invention further provides a battery pack including the battery as described above.

[0026] In a third aspect, the present invention further provides a vehicle including the battery as described above or the battery pack as described above.

[0027] For the battery provided by the present invention, by providing a boss on the main body of the outer casing and connecting the pole tab of the pole core to the pole post within the boss, heat dissipation can be achieved through the side surface of the boss for the pole post and the pole tab. At the same time, there is a spacing between the side surface of the boss and the side surface of the main body on the same side, such that the distance between the pole post or the pole tab and the side surface of the boss is closer than the distance between the pole post or the pole tab and the side surface of the main body. Thus, the heat transfer path can be shortened, the thermal resistance can be significantly reduced, and the heat conduction efficiency can be improved, thereby enhancing the heat dissipation effect of the pole post and the pole tab.

[0028] For the battery pack and the vehicle provided by the present invention, since they include the battery provided by the present invention, they simultaneously include all the above advantages of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of a battery provided by an embodiment of the present invention;

[0031] Figure 2 For Figure 1 an exploded view of the structure of the battery shown;

[0032] Figure 3 It is a schematic internal structure diagram of the battery provided by an embodiment of the present invention;

[0033] Figure 4 ForFigure 3 Partial enlarged view of A;

[0034] Figure 5 Schematic structural view of another battery provided by an embodiment of the present invention;

[0035] Figure 6 Schematic structural view of yet another battery provided by an embodiment of the present invention;

[0036] Figure 7 Schematic structural view of the cooperation between the battery and the cooling plate provided by an embodiment of the present invention;

[0037] Figure 8 Exploded view of the structure of the housing provided by an embodiment of the present invention;

[0038] Figure 9 Schematic structural view of the support member provided by an embodiment of the present invention;

[0039] Figure 10 Axonometric view of the support member provided by an embodiment of the present invention;

[0040] Figure 11 Schematic structural view of the cover plate installed with the terminal provided by an embodiment of the present invention;

[0041] Figure 12 is Figure 11 Exploded view of the structure of the view shown;

[0042] Figure 13 is Figure 11 Schematic view of other angles of the view shown.

[0043] Explanation of reference numerals:

[0044] 100, battery; 1, housing; 101, main body; 102, boss; 103, opening; 104, mounting opening; 105, sealing plate; 2, cover plate; 3, terminal; 301, connecting plate; 4, electrode core; 401, tab; 4011, positive tab; 4012, negative tab; 5, support member; 501, first plate body; 5011, first through hole; 502, second plate body; 5021, second through hole; 6, first insulating member; 601, liquid injection hole; 602, baffle; 603, connecting column; 7, second insulating member; 8, sealing ring; 9, fixing member; 10, third insulating member; 200, cooling plate; X, first direction; Y, second direction; Z, third direction. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] In the prior art, during high-rate charging, a large amount of heat is generated inside the battery. Especially in parts such as the tab and the terminal post, due to the high current density and large resistance, they become the main heat sources. If the large amount of heat generated in these parts cannot be dissipated in time, it will have a serious impact on the battery performance.

[0047] In the related art, more attention is paid to the overall temperature control of the battery. For example, the cooling plate is usually attached to the large surface of the battery, and the large surface of the battery is cooled through the cooling plate. However, the cooling plate is far from the parts such as the tab and the terminal post where more heat is generated. Therefore, the cooling effect on the terminal post and the tab is poor, which limits the performance of the battery under the condition of high-rate charging and easily causes local overheating of the battery, accelerating the battery aging.

[0048] To solve or improve the problem that it is not easy to cool the tab or the terminal post of the battery, an embodiment of the present invention provides a battery, a battery pack, and a vehicle.

[0049] The following combines Figures 1 to 13 , and describes the battery provided in the embodiment of the present invention.

[0050] Specifically, the battery 100 includes a housing 1, a terminal post 3, and a jelly roll 4.

[0051] Among them, the housing 1 includes a main body 101 and a boss 102, and both the inside of the main body 101 and the boss 102 are cavities, or in other words, both are hollow structures.

[0052] The main body 101 is a multi-prismatic structure, that is, the main body 101 has two end faces and a plurality of side faces arranged between the end faces. The boss 102 is disposed on the end face of the main body 101 facing the first direction. Specifically, the boss 102 protrudes from the end face of the main body 101 facing the first direction. For example, Figure 1 if the first direction shown is upward, the boss 102 is provided on the upward end face of the main body 101. The boss 102 communicates with the main body 101, that is, the cavity inside the boss 102 and the cavity inside the main body 101 communicate.

[0053] The boss 102 extends in the second direction, and there is a gap between the side of the boss 102 facing the third direction and the side of the main body 101 on the same side. Or rather, the side of the boss 102 facing the third direction is offset inward relative to the side of the main body 101 on the same side. The side of the main body 101 on the same side described here refers to the side of the main body 101 with the same side orientation as the side of the boss 102.

[0054] Among them, the first direction X, the second direction Y, and the third direction Z intersect pairwise, for example, they are pairwise perpendicular.

[0055] The terminal post 3 is arranged at one end of the boss 102 away from the main body 101, and one end of the terminal post 3 is arranged inside the boss 102. Optionally, one end of the terminal post 3 is arranged outside the boss 102, and the other end is arranged inside the boss 102.

[0056] The electrode core 4 is arranged inside the main body 101, and the electrode core 4 has an electrode tab 401. The electrode tab 401 of the electrode core 4 extends into the boss 102 and is connected to the terminal post 3. Optionally, the electrode core 4 can be set as a wound core, and of course, it can also be set as a stacked core. Optionally, the electrode tab 401 is welded to the terminal post 3. Of course, any other method that can electrically connect the electrode tab 401 to the terminal post 3 is acceptable, and this is not limited here.

[0057] In the related art, the heat of the terminal post 3 or the electrode tab 401 needs to be conducted outward through the side of the outer shell 1, and the distance between the terminal post 3 or the electrode tab 401 and the side of the outer shell 1 is relatively far, resulting in a long heat conduction path, low heat conduction efficiency, and poor heat dissipation effect.

[0058] In this embodiment, by arranging the boss 102 on the main body 101 of the outer shell 1, and the electrode tab 401 of the electrode core 4 is connected to the terminal post 3 inside the boss 102, the terminal post 3 and the electrode tab 401 can dissipate heat through the side of the boss 102. At the same time, there is a gap between the side of the boss 102 and the side of the main body 101 on the same side, so that the distance between the terminal post 3 or the electrode tab 401 and the side of the boss 102 is closer than the distance between the terminal post 3 or the electrode tab 401 and the side of the main body 101. Thus, the heat transfer path can be shortened, the thermal resistance can be greatly reduced, and the heat conduction efficiency can be improved, thereby improving the heat dissipation effect of the terminal post 3 and the electrode tab 401.

[0059] Furthermore, the area where the side of the boss 102 has a gap with the side of the main body 101 can be used to arrange the cooling plate 200, so that the cooling plate 200 contacts the side of the boss 102 and exchanges heat.

[0060] With such a setting, the heat generated by the terminal post 3 and the tab 401 is conducted to the cooling plate 200 through the side surface of the boss 102, and the cooling plate 200 quickly takes away the heat on the side surface of the boss 102. Compared with the related art in which the heat needs to be conducted along a longer path to the side surface of the housing 1 for heat dissipation, this embodiment can greatly shorten the heat dissipation path, reduce the loss during the heat transfer process, lower the thermal resistance, significantly improve the heat conduction efficiency and the heat dissipation effect, and help maintain the appropriate working temperature of components such as the terminal post 3 and the tab 401, thus ensuring the fast charging performance of the battery 100.

[0061] In addition, by using the space between the side surface of the boss 102 and the side surface of the main body 101 to arrange the cooling plate 200, the originally potentially wasted space is cleverly utilized, achieving efficient use of space.

[0062] In addition, in the related art, the tab 401 is usually pressed between the main body 4 of the electrode core and the cover plate 2. When the battery 100 is subjected to a vibration load, the tab 401 is easily squeezed or stretched by the main body 4 of the electrode core and damaged. It can be understood that the main body 4 of the electrode core refers to the part of the electrode core 4 except the tab 401.

[0063] In this embodiment, the tab 401 of the electrode core 4 is arranged in the internal cavity of the boss 102, that is, the tab 401 will not be squeezed by the main body 4 of the electrode core and the boss 102. And the end surface of the main body 101 can form a limit on the main body 4 of the electrode core in the direction perpendicular to the end surface. In this way, when the battery 100 is subjected to a vibration load in the direction perpendicular to the end surface of the main body 101, the electrode core 4 is limited by the end surface of the main body 101 and will not cause extrusion or pulling on the tab 401, which can reduce the extrusion or pulling on the tab 401, thereby reducing the probability of damage to the tab 401.

[0064] In some embodiments provided by the present invention, an explosion-proof valve is provided on the boss 102. According to actual needs, the explosion-proof valve can be arranged on the surface of the boss 102 away from the main body 101, or the explosion-proof valve can also be arranged on the side surface of the boss 102.

[0065] In this embodiment, the boss 102 faces the electrode core 4, and the inside of the boss 102 has a cavity, so that the boss 102 will not produce a fitting and covering effect on the electrode core 4, thus not hindering the gas generated by the electrode core 4, but can serve as an exhaust channel, making the gas discharge path smoother. For example, when thermal runaway occurs, the gas generated by the electrode core 4 can smoothly and quickly enter the boss 102 and be discharged through the explosion-proof valve on the boss 102 for pressure relief, avoiding the problem of the battery casing exploding.

[0066] In some embodiments provided by the present invention, both the main body 101 and the boss 102 are square structures. That is, both the main body 101 and the boss 102 are quadrangular prism structures. It can be understood that the regular structure of the square structure is beneficial to the grouping of the battery 100, and the square structure has good monomer structural strength.

[0067] Optionally, referring to Figure 1 and Figure 2 As shown, the two side surfaces of the boss 102 facing and departing from the second direction are respectively aligned with the side surfaces on the same side of the main body 101. That is, the side surface of the boss 102 facing the second direction is aligned with the side surface of the main body 101 facing the second direction, and the side surface of the boss 102 departing from the second direction is aligned with the side surface of the main body 101 departing from the second direction.

[0068] Furthermore, there is a spacing between the two side surfaces of the boss facing and departing from the third direction and the side surfaces on the same side of the main body 101. That is, there is a spacing between the side surface of the boss facing the third direction and the side surface of the main body 101 facing the third direction, and there is a spacing between the side surface of the boss departing from the third direction and the side surface of the main body 101 departing from the third direction.

[0069] In this embodiment, the two side surfaces of the boss 102 are aligned with the side surfaces on the same side of the main body 101, which can ensure the consistency and continuity of the size of the housing 1, facilitate the assembly and cooperation of the housing 1 with other components, and make the shape of the housing 1 relatively regular, reducing the processing difficulty of the housing 1.

[0070] In addition, the two side surfaces of the boss 102 having a spacing from the side surface of the main body 101 can both serve as heat dissipation surfaces. For example, cooling plates 200 can be arranged at both side surfaces. The heat generated by the tab 401 and the terminal 3 can be conducted out through these two side surfaces, so as to increase the heat dissipation area of the boss 102, improve the heat dissipation efficiency of the boss 102, accelerate the heat dissipation speed, and thus more effectively reduce the temperature of the tab 401 and the terminal 3.

[0071] Of course, the boss 102 is not limited to the form in which both opposite side surfaces have a spacing from the side surface of the main body 101. For example, referring to Figure 5 As shown, in some other embodiments provided by the present invention, the two side surfaces of the boss 102 facing and departing from the second direction, and the side surface departing from the third direction are respectively aligned with the side surfaces on the same side of the main body 101, and there is a spacing between the side surface of the boss 102 facing the third direction and the side surface on the same side of the main body 101.

[0072] Or rather, three side surfaces of the boss 102 are respectively aligned with the side surfaces on the same side of the main body 101, and there is a spacing between the other side surface and the side surface on the same side of the main body 101.

[0073] In this embodiment, the three side surfaces of the boss 102 are respectively aligned and connected with the side surfaces on the same side of the main body 101, so that there are more connection surfaces between the boss 102 and the main body 101, which can enhance the bonding strength between the two, enable the boss 102 to bear a greater load, and reduce the probability of damage or deformation of the boss 102.

[0074] Refer to Figure 1 and Figure 2 As shown, in some embodiments provided by the present invention, the number of the pole columns 3 is two, and both of the two pole columns 3 are arranged on the boss 102.

[0075] Furthermore, the pole tabs 401 include a positive pole tab 4011 and a negative pole tab 4012. Both the positive pole tab 4011 and the negative pole tab 4012 extend into the boss 102 and are connected to the corresponding pole column 3, that is, the positive pole tab 4011 extends into the boss 102 and is electrically connected to the corresponding pole column 3, and the negative pole tab 4012 extends into the boss 102 and is electrically connected to the corresponding pole column 3.

[0076] In this embodiment, the positive pole tab 4011, the negative pole tab 4012 and their corresponding pole columns 3 are concentrated in the boss 102, so that the key electrical connection parts of the battery 100 are concentrated in one area, which is convenient for uniformly connecting the pole columns 3 of the battery 100 with other electrical components, and is also convenient for managing and maintaining the battery 100.

[0077] In addition, the positive pole tab 4011, the negative pole tab 4012 and their corresponding pole columns 3 can all dissipate heat through the boss 102, which helps to dissipate heat from these components centrally, avoid local overheating, and improve the stability and reliability of the entire battery system.

[0078] In addition to this, the positive pole tab 4011, the negative pole tab 4012 and their corresponding pole columns 3 can all dissipate heat through the boss 102, making the whole structure more compact, eliminating the need to design complex heat dissipation structures for each component separately, reducing the space occupation, and at the same time enabling the heat to be uniformly transferred to the cooling system (such as the cooling plate 200) through the boss 102, reducing the complexity of the heat dissipation path.

[0079] Of course, the number of the pole columns 3 arranged on the boss 102 is not limited to two. For example, refer to Figure 6 As shown, in some other embodiments provided by the present invention, a boss 102 is also arranged on the end surface of the main body 101 facing away from the first direction, that is, bosses 102 are arranged on both end surfaces of the main body 101 facing and facing away from the first direction, and corresponding pole columns 3 are arranged on the bosses 102 on both end surfaces of the main body 101. For example, as Figure 6 shown, if the first direction is upward, then corresponding bosses are arranged on both the upward and downward end surfaces of the main body 101.

[0080] Further, the tab 401 includes a positive tab 4011 and a negative tab 4012. The positive tab 4011 and the negative tab 4012 respectively extend into the bosses 102 on the two end faces of the main body 101 and are connected to the corresponding pole columns 3. For example, referring to Figure 6 As shown, the positive tab 4011 extends into the boss 102 on the upper end face of the main body 101 and is connected to the pole column 3 on the upper end face. The negative tab 4012 extends into the boss 102 on the lower end face of the main body 101 and is connected to the pole column 3 on the lower end face.

[0081] In this embodiment, the positive tab 4011 and the negative tab 4012 are respectively located in the bosses 102 on the two end faces of the main body 101 and are connected to the corresponding pole columns 3, so that the functional areas of the positive and negative poles are separated, avoiding the short - circuit risk caused by the overly concentrated arrangement of the tabs 401.

[0082] On the other hand, the positive tab 4011 and the negative tab 4012 are respectively located in the two bosses 102, reducing the heat accumulation in a single boss 102, thereby reducing the risk of local overheating. And the tab 401 and the pole column 3 in each boss 102 can dissipate heat directly through the side or top of its corresponding boss 102, with a shorter heat dissipation path and higher efficiency. In addition, the cooling plate 200 can dissipate heat for the two bosses 102 respectively, further improving the heat dissipation effect.

[0083] In addition, since the positive tab 4011 and the negative tab 4012 are distributed in the two bosses 102, heat can be more evenly dissipated into the entire battery pack, reducing the local temperature difference, which helps to maintain the consistency of the overall working temperature of the battery 100 and improves the thermal management performance of the battery pack.

[0084] Referring to Figures 1 - 3 As shown, in some embodiments provided by the present invention, the boss 102 is provided with an opening 103 on the end face away from the main body 101, and the opening 103 is closed by a cover plate 2. For example, the cover plate 2 can be closed at the opening 103 of the boss 102 by means of welding and fixing.

[0085] Correspondingly, the pole column 3 is arranged on the cover plate 2. For example, one end of the pole column 3 is arranged on the side of the cover plate 2 away from the boss 102, and the other end passes through the cover plate 2 and is arranged inside the boss 102.

[0086] In this embodiment, by providing the opening 103 on the boss 102 and closing the opening 103 with the cover plate 2, during the process of assembling the battery 100, after connecting the tab 401 of the electrode core 4 to the pole column 3 on the cover plate 2, the electrode core 4 can be placed into the main body 101. Finally, the cover plate 2 is closed at the opening 103 of the boss 102.

[0087] As described above, such a setting facilitates the connection between the tab 401 and the terminal 3, and the connection between the tab 401 and the terminal 3 can be carried out in a relatively loose environment, so as to facilitate the operator to perform precise operations and ensure the connection quality between the tab 401 and the terminal 3.

[0088] Reference Figure 2 and Figure 8 As shown, in some embodiments provided by the present invention, the side surface of the boss 102 facing the second direction is aligned with the side surface of the main body 101 on the same side. That is, the side surface of the boss 102 facing the second direction is aligned with the side surface of the main body 101 facing the second direction.

[0089] Furthermore, an installation opening 104 through which the electrode core 4 can pass is provided on the outer shell 1, and the installation opening 104 faces the second direction. A part of the installation opening 104 is located on the side surface of the main body 101, and the other part is located on the side surface of the boss 102. For example, the installation opening 104 communicates with the opening 103 on the boss 102. The installation opening 104 is closed by a sealing plate 105. For example, the sealing plate 105 can be closed on the installation opening 104 by means of welding fixation.

[0090] In this embodiment, during the assembly of the battery 100, the tab 401 of the electrode core 4 is welded to the terminal 3 on the cover plate 2, and a third insulating member 10 is wrapped around the outside of the electrode core 4. The third insulating member 10 can be a Mylar film. An insulating tape is attached to the tab 401 to prevent the tab 401 from being torn when entering the shell. Then, the electrode core 4 is inserted into the outer shell 1 through the installation opening 104, and the installation opening 104 is closed by the sealing plate 105. Then, the cover plate 2 closes the opening 103 of the boss 102. The cover plate 2 is connected to the sealing plate 105.

[0091] With such a setting, under the condition that the cross-sectional area of the electrode core 4 is larger than the area of the opening 103, the electrode core 4 can be inserted into the outer shell 1 from the installation opening 104 on one side of the outer shell 1.

[0092] Of course, the installation opening 104 is not limited to being provided on one side of the outer shell 1. For example, in some embodiments not shown in the present invention, an installation opening 104 is provided at one end of the main body 101 away from the boss 102 for the electrode core 4 to pass through. And the installation opening 104 is closed by a sealing plate 105.

[0093] Reference Figures 2 - 4 As shown, in some embodiments provided by the present invention, the battery 100 further includes a support member 5. The support member 5 is an insulating member. For example, the support member 5 can be made of plastic material. Of course, the support member 5 can also be rubber or ceramic.

[0094] As Figures 2 - 4 shown, specifically, the support member 5 includes a first plate body 501 and a second plate body 502.

[0095] Among them, at least a part of the first plate body 501 is disposed within the boss 102, and the first plate body 501 is disposed inside the side surface of the boss 102 having a distance from the side surface of the main body 101. Or rather, the first plate body 501 is disposed inside the side surface of the boss 102 that is retracted relative to the side surface of the main body 101.

[0096] The second plate body 502 is disposed between the electrode core 4 and the end surface of the main body 101 provided with the boss 102, and is used to limit the electrode core 4 in the direction perpendicular to the end surface of the main body 101. One end of the second plate body 502 is connected to the first plate body 501, and the other end extends in the direction away from the electrode tab 401. For example, the first plate body 501 and the second plate body 502 can be set as an integral structure.

[0097] In this embodiment, the support member 5 has at least the following advantages:

[0098] First, the electrode tab 401 of the electrode core 4 is disposed inside the inner cavity of the boss 102, that is, the electrode tab 401 will not be squeezed by the main body of the electrode core 4 and the boss 102. And the second plate body 502 of the support member 5 can limit the main body of the electrode core 4 in the direction perpendicular to the end surface. Thus, when the battery 100 is subjected to a vibration load in the direction perpendicular to the end surface of the main body 101, the electrode core 4 is limited by the end surface of the main body 101, and the extrusion or pulling of the electrode tab 401 by the main body of the electrode core 4 can be reduced, thereby reducing the probability of damage to the electrode tab 401.

[0099] Second, as shown in Figure 4 , the first plate body 501 can prevent the problem of short circuit caused by the direct contact between the electrode tab 401 and the inner wall of the boss 102.

[0100] Third, as shown in Figure 4 , the second plate body 502 can prevent the problem of short circuit caused by the direct contact between the main body of the electrode core 4 and the end surface of the main body 101.

[0101] Fourth, as shown in Figure 2 and Figure 4 , before the electrode core 4 is placed into the housing 1 from the installation opening 104, the support member 5 can be installed on the electrode core 4 first. Thus, the support member 5 can protect the electrode tab 401 on the electrode core 4, prevent the edge of the installation opening 104 from knocking and squeezing the electrode tab 401, reduce the probability of injury to the electrode tab 401, and ensure the quality of the battery 100.

[0102] As shown in Figure 4 and Figure 10 , in some embodiments provided by the present invention, the first plate body 501 is provided with a first through hole 5011, the second plate body 502 is provided with a second through hole 5021, and the first through hole 5011 and the second through hole 5021 are communicated. Optionally, both the first through hole 5011 and the second through hole are set as long holes.

[0103] In this embodiment, by providing a second through hole 5021 on the second plate body 502, the gas generated by the electrode core 4 can be discharged through the second through hole 5021 on the second plate body 502, reducing the obstructive effect of the second plate body 502 on the gas discharge of the electrode core 4.

[0104] In addition, after the gas discharged from the electrode core 4 passes through the second plate body 502, it can enter between the inner wall of the first plate body 501 and the boss 102 along the second plate body 502. By providing a first through hole 5011 on the first plate body 501, the gas between the first plate body 501 and the inner wall of the boss 102 can enter the boss 102 through the first through hole 5011 and finally be discharged through the explosion-proof valve. In this way, the gas between the first plate body 501 and the inner wall of the boss 102 can be quickly discharged, avoiding the obstruction of the first plate body 501 to the gas discharge.

[0105] In addition, by providing through holes on the first plate body 501 and the second plate body 502, it helps to reduce the weight of the support member 5, so that the battery 100 meets the requirement of light weight.

[0106] In some embodiments provided by the present invention, the interval dimension range between the first through holes 5011 is 2 mm to 10 mm. With such a setting, it can not only meet the structural strength of the support member 5, but also not cover too much area of the electrode core 4 to affect gas discharge.

[0107] Similarly, the interval dimension range between the second through holes 5021 is 2 mm to 10 mm. With such a setting, it can not only meet the structural strength of the support member 5, but also not cover too much area of the electrode core 4 to affect gas discharge.

[0108] Refer to Figure 4 and Figure 9 As shown, in some embodiments provided by the present invention, the angle between the first plate body 501 and the second plate body 502 is greater than 90 degrees. For example, the value range of the angle between the first plate body 501 and the second plate body 502 is 91 degrees to 95 degrees.

[0109] In this embodiment, by making the angle between the second plate body 502 and the first plate body 501 greater than 90 degrees, the second plate body 502 is inclined between the electrode core 4 and the end face of the main body 101. Even if there is a certain machining error, the inclined second plate body 502 can still better contact the electrode core 4 and apply a force to the electrode core 4 through deformation, so as to realize the limit of the electrode core 4 in the direction perpendicular to the end face of the main body 101.

[0110] In addition, since the second plate body 502 itself has a certain elasticity or deformation ability, it can deform to a certain extent instantaneously when impacted, converting the impact force into its own elastic potential energy or deformation energy, thereby slowing down the speed and intensity of the impact force transmitted to the electrode core 4, playing a buffering role, and reducing the magnitude of the impact force directly borne by the electrode core 4.

[0111] Optionally, the first plate body 501 and the second plate body 502 are connected by a smooth fillet transition. By providing a fillet between the first plate body 501 and the second plate body 502, it is possible to avoid the generation of edges at the connection between the first plate body 501 and the second plate body 502 and cause damage to the tab 401.

[0112] Reference Figures 2 - 4 As shown, in some embodiments provided by the present invention, the battery 100 further includes a first insulating member 6. The first insulating member 6 is provided in the boss 102. For example, the first insulating member 6 is provided as an insulating pad.

[0113] One end of the terminal post 3 located in the boss 102 is provided with a connecting plate 301, and the first insulating member 6 is provided on the side of the connecting plate 301 away from the electrode core 4. The tab 401 is connected to the surface of the connecting plate 301 close to the electrode core 4. The first plate body 501 is connected to the first insulating member 6.

[0114] In this embodiment, by providing the first insulating member 6 and the first insulating member 6 is provided on the side of the connecting plate 301 away from the electrode core 4, it is possible to effectively isolate the electrical connection between the connecting plate 301 and the boss 102. For example, the first insulating member 6 is located between the cover plate 2 and the connecting plate 301, so that it is possible to avoid the problem of short circuit caused by direct contact between the connecting plate 301 and the cover plate 2.

[0115] The connection between the first plate body 501 and the first insulating member 6 can increase the fixing points of the first plate body 501 and improve the stability of the installation of the support member 5. In addition, before the electrode core 4 is placed into the housing 1 through the installation opening 104, the first plate body 501 and the first insulating member 6 can be connected. With such a setting, during the process of loading the electrode core 4, the stability of the support member 5 can be improved, and the problem of displacement or detachment of the support member 5 can be avoided.

[0116] Optionally, the first plate body 501 and the first insulating member 6 can be connected by a snap structure. Specifically, one of the first plate body 501 and the first insulating member 6 is provided with a snap projection, and the other is provided with a snap groove.

[0117] With such a setting, the connection method of the snap structure does not require the use of additional tools (such as screws, glue, etc.). Just snap the snap projection into the snap groove, and the quick connection between the first plate body 501 and the first insulating member 6 can be achieved.

[0118] Optionally, corresponding support members 5 are provided on the inner sides of the sides of the boss 102 that have a spacing from the side of the main body 101. Refer to Figure 3 As shown, examples are provided where corresponding support members 5 are provided on two opposite sides of the boss 102, and an exhaust passage can be formed between the two support members 5.

[0119] In some embodiments provided by the present invention, the battery further includes a first insulating member 6, and the first insulating member 6 is provided inside the boss 102. For example, a connecting plate 301 is provided at one end of the pole column 3 located inside the boss 102, and the first insulating member 6 is provided on the side of the connecting plate 301 away from the electrode core 4 to prevent the connecting plate 301 and the pole ear from contacting the boss 102.

[0120] A liquid injection hole 601 is provided on the first insulating member 6, and the liquid injection hole 601 penetrates through the first insulating member 6. The liquid injection hole 601 on the first insulating member 6 is disposed opposite to the liquid injection port on the cover plate 2, so as to facilitate injecting electrolyte into the housing 1 of the battery through the liquid injection port on the cover plate 2 and the liquid injection hole 601 on the first insulating member 6.

[0121] Furthermore, refer to Figure 13 As shown, a connecting column 603 is provided on the surface of the first insulating member 6 close to the electrode core 4, and a baffle 602 is provided at one end of the connecting column 603 close to the electrode core 4, and the baffle 602 is disposed opposite to the liquid injection hole 601. It can be understood that there is a spacing between the baffle 602 and the surface of the first insulating member 6 close to the electrode core 4.

[0122] In this embodiment, by providing the connecting column 603 and the baffle 602 on the surface of the first insulating member 6 close to the electrode core 4, during the process of injecting electrolyte, after the electrolyte flows through the liquid injection hole 601, the flow direction changes under the blocking action of the baffle 602, that is, the flow direction changes from the original axial direction of the liquid injection hole to a direction intersecting the axial direction of the liquid injection hole, thereby avoiding the problem that the electrolyte directly impacts the electrode core 4 and causes damage to the structure of the electrode core 4.

[0123] Optionally, the number of the connecting columns 603 can be set to at least two to improve the structural stability of the baffle 602. For example Figure 13 As shown, an example is provided where the number of the connecting columns 603 is four.

[0124] Refer to Figure 3 As shown, in some embodiments provided by the present invention, at least two electrode cores 4 are provided in the battery 100, the pole ears 401 of the at least two electrode cores 4 all extend into the boss 102, and the positive pole ears 4011 of the at least two electrode cores 4 are all connected to the corresponding positive pole columns 3, and the negative pole ears 4012 of the at least two electrode cores 4 are all connected to the corresponding negative pole columns 3.

[0125] In this embodiment, the tab 401 can extend within the boss 102, that is, the degree of folding of the portion of the tab 401 between the cover plate 2 and the electrode core 4 is small, which can avoid the tab 401 from obstructing the exhaust of the electrode core 4 and make the exhaust of the electrode core 4 smoother. In addition, a spacing between the tabs 401 of the same polarity of the two electrode cores 4 can also form an exhaust passage to enable the gas to be discharged smoothly.

[0126] Referring to Figures 1 - 3 As shown, in some embodiments provided by the present invention, the battery 100 is provided with two electrode cores 4, the two electrode cores 4 are arranged along the third direction, and there are spacings between the two side surfaces of the boss 102 in the third direction and the side surfaces of the main body 101 on the same side. As Figure 3 shown, the thickness of the electrode core 4 in the third direction is L, the spacing between the side surface of the boss 102 in the third direction and the side surface of the main body 101 on the same side is L1, and the height of the protrusion of the boss 102 is L2.

[0127] Optionally, L1 and L satisfy: 1 / 3L ≤ L1 ≤ 2 / 3L.

[0128] In this embodiment, L1 is greater than 1 / 3 of the thickness of the electrode core 4, aiming to ensure a large contact area between the battery and the liquid cooling plate. L1 is less than 2 / 3 of the thickness of the electrode core 4, aiming to ensure that the number of tabs 401 of the electrode core 4 can meet the overcurrent requirements for fast charging.

[0129] Optionally, L2 satisfies: 1 mm ≤ L2 ≤ 10 mm.

[0130] In this embodiment, if the size of L2 is too large, the proportion of the size of the boss 102 in the first direction relative to the size of the battery 100 is too large, and the size of the cooling plate 200 increases accordingly, resulting in a reduction in the space utilization rate of the battery 100 and an inability to well balance the relationship between the tab 401, the pole column 3, liquid cooling, and space utilization rate. If the size of the boss 102 is too small, the heat dissipation effect cannot be guaranteed.

[0131] In some embodiments provided by the present invention, the battery 100 includes a second insulating member 7 and a fixing member 9. One end of the pole column 3 away from the boss 102 passes through the cover plate 2 and is connected to the fixing member 9. For example, the pole column 3 can be riveted or welded to the fixing member 9.

[0132] The second insulating member 7 is arranged between the fixing member 9 and the cover plate 2 to prevent the fixing member 9 from directly contacting the cover plate 2 and causing a short circuit.

[0133] Optionally, the second insulating member 7 can be rubber or plastic.

[0134] In some embodiments provided by the present invention, the battery 100 further includes a third insulating member 10, and the third insulating member 10 is disposed outside the electrode core 4. By providing the third insulating member 10, the problem of short circuit caused by direct contact between the electrode core 4 and the main body 101 can be avoided.

[0135] Optionally, the third insulating member 10 can be set as a Mylar film, or it can also be an insulating film formed of other insulating materials.

[0136] Optionally, an insulating film is provided on the outer surface of the battery 100, and the insulating film can cover the main body 101 and the boss 102 to avoid short circuit due to direct contact between the batteries 100 in the battery pack. For example, the insulating film can be set as a PET film, and PET is polyethylene terephthalate.

[0137] Of course, the insulating film is not limited to the PET film. For example, the insulating film can also be a film structure formed by an ultraviolet curing process or an electrostatic spraying process, and the material of the insulating film is not limited herein.

[0138] In some embodiments provided by the present invention, the battery 100 further includes a sealing ring 8, and the sealing ring 8 is sleeved on the pole column 3 and is located between the pole column 3 and the cover plate 2. The sealing ring 8 can not only seal the gap between the pole column 3 and the cover plate 2, but also avoid short circuit caused by contact between the pole column 3 and the cover plate 2.

[0139] In some embodiments provided by the present invention, an insulating structure is provided on the surface of the cover plate 2 facing away from the main body 101, so as to improve the insulation effect of the battery 100. Optionally, the insulating structure can be set as an insulating sheet, or it can also be an insulating film formed by a spraying process or a coating process.

[0140] Refer to Figure 4 As shown, in some embodiments provided by the present invention, the side surface of the boss 102 having a distance from the side surface of the main body 101 is smoothly connected to the end surface of the main body 101 through a rounded corner structure. By setting like this, the rounded corner transition can disperse stress, reduce stress concentration, and improve the strength and fatigue life of the outer shell 1. And the rounded corner design enhances the mechanical strength at the connection between the boss 102 and the main body 101, reducing the risk of cracks and fractures.

[0141] Optionally, the outer shell 1 is set as an aluminum shell or a steel shell.

[0142] An embodiment of the present invention also provides a battery pack.

[0143] Specifically, the battery pack includes the battery 100 as described above.

[0144] The battery pack includes the battery 100, and at the same time includes all the above advantages of the battery 100, so it will not be elaborated herein.

[0145] Further, referring to Figure 7 as shown, the battery pack further includes a cooling plate 200.

[0146] Specifically, the cooling plate 200 includes a first cooling plate 200 and a second cooling plate 200. There is an included angle between the first cooling plate 200 and the second cooling plate 200, for example, they are perpendicular to each other. Among them, the first cooling plate 200 is attached to the side surface of the main body 101, and the second cooling plate 200 is attached to the side surface of the boss 102 with a spacing from the side surface of the main body 101.

[0147] In this embodiment, the first cooling plate 200 and the second cooling plate 200 are respectively attached to the side surfaces of the main body 101 and the boss 102, forming multiple heat dissipation paths, significantly improving the heat dissipation efficiency. The first cooling plate 200 focuses on the heat dissipation of the side surface of the main body 101, while the second cooling plate 200 focuses on the heat dissipation of the side surface of the boss 102, which can better meet the heat dissipation requirements of different regions. Through efficient heat dissipation, the temperatures of key components such as the tab 401 and the terminal 3 can be effectively reduced, extending their service lives.

[0148] Optionally, batteries 100 are provided on both sides of the first cooling plate 200, and the two ends of the second cooling plate 200 are respectively arranged on both sides of the first cooling plate 200, and the two ends of the second cooling plate 200 are respectively abutted against the side surfaces of the corresponding bosses 102.

[0149] In this embodiment, batteries 100 are provided on both sides of the first cooling plate 200, so that the cooling plate 200 can provide heat dissipation support for the batteries 100 on both sides at the same time, improving the overall heat dissipation efficiency.

[0150] In addition, as the main cooling component, the design of arranging the batteries 100 on both sides of the first cooling plate 200 makes full use of the space. And the two ends of the second cooling plate 200 are abutted against the side surfaces of the bosses 102, which can make full use of the space between the two bosses 102.

[0151] An embodiment of the present invention further provides a vehicle.

[0152] Specifically, the vehicle includes the battery 100 or the battery pack as described above.

[0153] It should be noted that since the vehicle includes the battery 100 or the battery pack, it also includes the corresponding advantages, so this will not be elaborated here.

[0154] It should be noted that the vehicle includes but is not limited to vehicles and aircraft. Among them, the vehicle can be a pure electric vehicle or a hybrid vehicle.

[0155] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that, include: A housing (1) comprises a main body (101) and a boss (102), both of which are hollow inside, the main body (101) being a multi-prism structure, the boss (102) being arranged on an end surface of the main body (101) facing a first direction and being in communication with the main body (101), the boss (102) extending along a second direction, and a spacing being provided between a side surface of the boss (102) facing a third direction and a side surface of the main body (101) on the same side; A pole (3) is arranged at an end of the boss (102) away from the main body (101), and one end of the pole (3) is arranged inside the boss (102); The pole core (4) is arranged in the main body (101), and the pole ear (401) of the pole core (4) extends into the boss (102) and is connected to the pole column (3).

2. The battery according to claim 1, wherein, The two side surfaces of the boss (102) facing and away from the second direction are respectively aligned with the side surfaces on the same side of the main body (101), and there is a distance between the side surface of the boss (102) away from the third direction and the side surface on the same side of the main body (101); Alternatively, the two side surfaces of the boss (102) facing and away from the second direction, and the side surface away from the third direction are respectively aligned with the side surfaces on the same side of the main body (101).

3. The battery according to claim 1, wherein The number of the poles (3) is two, and the two poles (3) are both arranged on the boss (102); The pole lug (401) comprises a positive pole lug (4011) and a negative pole lug (4012); the positive pole lug (4011) and the negative pole lug (4012) both extend into the boss (102) and are connected to the corresponding pole column (3).

4. The battery according to claim 1, characterized in that, The end surface of the main body (101) facing away from the first direction is also provided with a corresponding boss (102), and the bosses (102) on both end surfaces of the main body (101) are provided with corresponding poles (3); The pole lug (401) comprises a positive pole lug (4011) and a negative pole lug (4012); the positive pole lug (4011) and the negative pole lug (4012) respectively extend into the bosses (102) on the two end surfaces of the main body (101) and are connected to the corresponding pole posts (3).

5. The battery according to any one of claims 1-4, characterized in that, The side surface of the boss (102) facing the second direction is aligned with the side surface of the main body (101) on the same side; the housing (1) is provided with a mounting opening (104) facing the second direction and allowing the pole core (4) to pass through; a portion of the mounting opening (104) is located on the side surface of the main body (101), and another portion is located on the side surface of the boss (102); the mounting opening (104) is closed by a sealing plate (105); And / or, an end surface of the boss (102) away from the main body (101) is provided with an opening (103), and the opening (103) is closed by a cover plate (2), and the pole (3) is arranged on the cover plate (2).

6. The battery according to any one of claims 1-4, characterized in that, The battery (100) further comprises a support member (5), wherein the support member (5) is an insulating member, and the support member (5) comprises: The first plate body (501) is at least partially disposed within the boss (102), and the first plate body (501) is disposed inside the side surface of the boss (102) having a spacing from the side surface of the main body (101); The second plate body (502) is disposed between the pole core (4) and the end surface of the main body (101) provided with the boss (102), and is used to limit the pole core (4) in the direction perpendicular to the end surface of the main body (101). One end of the second plate body (502) is connected to the first plate body (501), and the other end extends in a direction away from the tab (401).

7. The battery according to claim 6, characterized in that, The first plate body (501) is provided with a first through hole (5011), and the second plate body (502) is provided with a second through hole (5021), and the first through hole (5011) and the second through hole (5021) are communicated.

8. The battery according to claim 6, wherein The battery (100) further includes a first insulating member (6), and the first insulating member (6) is disposed within the boss (102); One end of the pole column (3) located within the boss (102) is provided with a connecting plate (301), the first insulating member (6) is disposed on the side of the connecting plate (301) away from the pole core (4), the tab (401) is connected to the surface of the connecting plate (301) close to the pole core (4), and the first plate body (501) is connected to the first insulating member (6).

9. The battery according to claim 8, characterized in that, The first insulating member (6) is provided with a liquid injection hole (601), the surface of the first insulating member (6) close to the pole core (4) is provided with a connecting column (603), one end of the connecting column (603) close to the pole core (4) is provided with a baffle (602), and the baffle (602) is disposed opposite to the liquid injection hole (601).

10. A battery pack, characterized in that, Including the battery (100) according to any one of claims 1-9.

11. A vehicle, characterized in that, Including the battery (100) according to any one of claims 1-9 or the battery pack according to claim 10.

Images