Battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery which comprises a battery monomer and a heat dissipation piece, the battery monomer comprises a battery shell, the battery shell comprises a cover plate, the cover plate comprises a first side plate, a second side plate and a third side plate, and the second side plate and the third side plate are oppositely arranged in the length direction of the battery shell. The second side plate, the first side plate and the third side plate are sequentially connected to form a first U-shaped frame body structure; a first pole is arranged on the second side plate, and a second pole is arranged on the third side plate; the heat dissipation piece comprises a second heat dissipation plate, a first heat dissipation plate and a third heat dissipation plate, the second heat dissipation plate, the first heat dissipation plate and the third heat dissipation plate are sequentially connected to form a second U-shaped frame structure, the second heat dissipation plate is attached to the second side plate, the first heat dissipation plate is attached to the first side plate, and the third heat dissipation plate is attached to the second side plate. The third heat dissipation plate is attached to the third side plate. The battery provided by the utility model has good heat dissipation performance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery. Background Art

[0002] Secondary batteries generate a lot of heat during the charging and discharging process, of which part comes from the heat generated by the chemical reaction transfer between lithium ions and electrons, part comes from the Joule heat generated by the mechanical resistance of the battery, and part comes from the polarization heat generated by the polarization reaction. The heat generated during the operation of the battery system accumulates, causing uneven temperatures everywhere, affecting the temperature consistency of the battery cells, thereby reducing the efficiency of the battery charge and discharge cycle, and affecting the power and energy of the battery.

[0003] Since the electrode terminals and adapter components are in a closed housing, there is no time to dissipate heat, so the temperature near this place is higher. In the prior art, a heat dissipation component is usually set on the bottom surface of the blade battery, while the electrode terminals and adapter components are set on the side of the blade battery, resulting in the heat of the electrode terminals and adapter components needing to be transferred to the bottom of the blade battery through the battery cell first, and then transferred out by the heat dissipation component at the bottom, resulting in poor heat dissipation effect of the electrode terminals and adapter components.

[0004] Therefore, it is urgent to propose a battery to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a battery, which has good heat dissipation performance.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery comprising:

[0008] A battery cell, comprising a battery housing, wherein the battery housing comprises a cover plate, a first side plate of the cover plate, and a second side plate and a third side plate arranged opposite to each other along the length direction of the battery housing, wherein the second side plate, the first side plate and the third side plate are sequentially connected to form a first U-shaped frame structure; a first pole is arranged on the second side plate, and a second pole is arranged on the third side plate;

[0009] The heat sink comprises a second heat sink, a first heat sink and a third heat sink, wherein the second heat sink, the first heat sink and the third heat sink are sequentially connected to form a second U-shaped frame structure, the second heat sink is attached to the second side plate, the first heat sink is attached to the first side plate, and the third heat sink is attached to the third side plate.

[0010] Optionally, the second side plate includes a first mounting section and a first connecting section, and the first pole is arranged in the first mounting section; the third side plate includes a second mounting section and a second connecting section, and the second pole is arranged in the second mounting section; the first side plate connects the first connecting section and the second connecting section; the second heat sink and the first connecting section are arranged in a close fit; the third heat sink and the second connecting section are arranged in a close fit.

[0011] Optionally, the second side panel also includes a first transition section, and the first mounting section and the first connecting section are connected by the first transition section; the third side panel also includes a second transition section, and the second mounting section and the second connecting section are connected by the second transition section; the first connecting section is closer to the center line of the battery case than the first mounting section, and the second connecting section is closer to the center line of the battery case than the second mounting section, wherein the center line of the battery case is parallel to the height direction of the battery case.

[0012] Optionally, in the length direction of the battery housing, a distance between the first connecting section and the first mounting section and a distance between the second connecting section and the second mounting section are both 2 mm to 10 mm.

[0013] Optionally, in the height direction of the battery shell, the length of the first connecting section is L1, the length of the second connecting section is L2, the length of the second side plate is L3, and the length of the third side plate is L5; in the length direction of the battery shell, the length of the first side plate is L4, wherein L1+L2+L4>1 / 2(L3+L4+L5), L1<L3, L2<L5.

[0014] Optionally, in the height direction of the battery shell, the distance between the edge of the first pole close to the first connecting section and the edge of the first connecting section close to the first pole is less than 10 mm; the distance between the edge of the second pole close to the second connecting section and the edge of the second connecting section close to the second pole is less than 10 mm.

[0015] Optionally, the first connecting section and the second heat sink as well as the second connecting section and the third heat sink are connected via a clamping assembly.

[0016] Optionally, the snap-on assembly includes a protrusion and a groove cooperating with the protrusion; the side of the first connecting section facing the second heat sink and the side of the second connecting section facing the third heat sink are both provided with protrusions; the side of the second heat sink facing the first connecting section and the side of the third heat sink facing the second connecting section are both provided with grooves, wherein, in the thickness direction of the battery casing, at least one end of the groove extends and passes through the heat sink.

[0017] Optionally, the battery cell further includes an explosion-proof valve, and the explosion-proof valve is arranged on the first side plate;

[0018] The thickness of the first side plate, the thickness of the first connecting section and the thickness of the second connecting section are all d1, 0.3 mm ≤ d1 ≤ 1 mm;

[0019] The thickness of the first installation section and the thickness of the second installation section are both d2, d1<d2, 1.2mm≤d2≤3mm.

[0020] Optionally, the battery cell also includes a battery cell. In the height direction of the battery shell, the battery cell has a first end face arranged opposite to the first side plate and a second end face arranged away from the first end face. The second end face of the battery cell leads to a first pole ear and a second pole ear with opposite polarities. The first pole ear is connected to the first pole via a first adapter plate; the second pole is connected to the second pole via a second adapter plate.

[0021] The battery provided by the utility model has at least the following beneficial effects:

[0022] The battery casing comprises a cover plate, the cover plate comprises a first side plate, a second side plate and a third side plate, the second side plate is provided with a first pole, the third side plate is provided with a second pole, the first side plate is attached with a first heat sink for heat dissipation, the second side plate is attached with a second heat sink for heat dissipation, and the third side plate is attached with a third heat sink for heat dissipation. During the charging and discharging process of the battery, the heat generated by the first pole is transferred to the second side plate, and the heat on the second side plate can be dissipated through the second heat sink, the heat generated by the second pole is transferred to the third side plate, and the heat on the third side plate can be dissipated through the third heat sink, a part of the heat on the second heat sink and the third heat sink can be directly released to the external environment, and the other part can be transferred to the first heat sink, and then released to the external environment through the first heat sink, so that the first side plate, the second side plate and the third side plate are all in contact with the heat sink, thereby improving the heat dissipation effect of the battery, ensuring the charging and discharging cycle efficiency and the use safety of the battery, and thus ensuring the power and energy of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of the battery provided by the utility model;

[0025] Figure 2 It is a schematic diagram of the exploded structure of the battery provided by the utility model;

[0026] Figure 3 It is a structural schematic diagram of the battery housing provided by the utility model;

[0027] Figure 4 The utility model provides Figure 3 A in the enlarged view;

[0028] Figure 5 It is a cross-sectional view of the battery provided by the utility model;

[0029] Figure 6 It is a schematic diagram of the structure of the battery provided by the utility model without showing the outer shell;

[0030] Figure 7 It is a structural schematic diagram of a battery including a plurality of battery cells provided by the utility model;

[0031] Figure 8 It is a structural schematic diagram of a plate provided by the utility model.

[0032] In the figure:

[0033] 10. Battery cells;

[0034] 20. Plates;

[0035] 100, battery housing; 101, center line; 110, first side plate; 120, second side plate; 12a, protrusion; 121, first mounting section; 122, first connecting section; 123, first transition section; 130, third side plate; 131, second mounting section; 132, second connecting section; 133, second transition section; 141, first pole; 142, second pole; 150, explosion-proof valve; 160, battery cell; 161, second end face; 162, first pole ear; 163, second pole ear; 171, first adapter; 172, second adapter;

[0036] 200, heat sink; 210, first heat sink; 220, second heat sink; 230, third heat sink; 240, groove;

[0037] 300, outer shell; 310, first shell plate; 320, second shell plate; 330, third shell plate. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] This embodiment provides a battery with good heat dissipation effect, ensuring the charge and discharge cycle efficiency of the battery.

[0043] like Figures 1 to 8 As shown, the battery includes a battery cell 10 and a heat sink 200. The battery cell 10 includes a battery housing 100. Figure 2As shown, the battery housing 100 includes a cover plate, a first side plate 110 of the cover plate, and a second side plate 120 and a third side plate 130 arranged opposite to each other along the length direction of the battery housing 100. Among them, the second side plate 120, the first side plate 110 and the third side plate 130 are sequentially connected to form a first U-shaped frame structure (not shown). A first pole 141 is arranged on the second side plate 120, and a second pole 142 is arranged on the third side plate 130. One of the first pole 141 and the second pole 142 is used to be electrically connected to the positive pole ear of the battery cell 160, and the other is used to be electrically connected to the negative pole ear of the battery cell 160.

[0044] It should be noted that the cover plate can be an integrally formed structure, for example: the second side panel 120 and the first side panel 110 are integrally formed, and the first side panel 110 and the third side panel 130 are integrally formed; the cover plate can also be a split structure, for example: the second side panel 120 and the first side panel 110 are welded, and the first side panel 110 and the third side panel 130 are welded.

[0045] Please continue to see Figure 2 The heat sink 200 includes a second heat sink 220, a first heat sink 210 and a third heat sink 230. The second heat sink 220, the first heat sink 210 and the third heat sink 230 are sequentially connected to form a second U-shaped frame structure.

[0046] In this embodiment, the first side plate 110 is attached with a first heat sink 210 for heat dissipation, the second side plate 120 is attached with a second heat sink 220 for heat dissipation, and the third side plate 130 is attached with a third heat sink 230 for heat dissipation. During the charging and discharging process of the battery, the heat generated at the first pole 141 is transferred to the second heat sink 220 through the second side plate 120, and the heat generated at the second pole 142 is transferred to the third heat sink 230 through the third side plate 130. A part of the heat can be directly released to the external environment through the second heat sink 220 and the third heat sink 230, and the remaining heat can be transferred to the first heat sink 210, and then released to the external environment through the first heat sink 210. Since the first side plate 110, the second side plate 120 and the third side plate 130 are all in contact with the heat sink 200, the heat dissipation effect of the battery is improved, the charging and discharging cycle efficiency and the use safety of the battery are guaranteed, and the power and energy of the battery are guaranteed.

[0047] It should be noted that the battery here is a battery pack composed of multiple battery cells or multiple battery modules, or a battery module composed of multiple battery cells.

[0048] Optionally, the material of the heat sink in this embodiment can be a thermally conductive material with good thermal conductivity or high thermal conductivity. In some optional embodiments, the heat sink can be a thermally conductive gasket prepared by using resin as a carrier and adding thermally conductive fillers. In other optional embodiments, the heat sink can be a thermally conductive silicone grease made by using organic silicone as the main raw material and adding materials with excellent thermal conductivity. In other optional embodiments, the heat sink can be a thermally conductive gel mainly composed of silica gel. Alternatively, the heat sink can be a thermally conductive structural adhesive mainly composed of polyurethane and epoxy resin. It should be noted that this embodiment only provides several material examples of the heat sink, and is not limited to this.

[0049] It should also be noted that the heat sink may be provided with heat sinks, liquid cooling medium or gaseous cooling medium, etc., to improve the heat dissipation performance of the heat sink. Of course, it is understandable that the heat sink may also be a solid structure, which is not limited in this embodiment.

[0050] In this embodiment, the heat sink 200 can be an air cooling device, a liquid cooling device or a direct cooling device. The air cooling device specifically uses a fan to accelerate air circulation to achieve heat dissipation; the liquid cooling device specifically uses antifreeze (or coolant) such as water or a mixture of water and ethylene glycol to take away heat; the direct cooling device specifically uses a refrigerant (such as tetrafluoroethane) to take away heat directly to achieve heat dissipation.

[0051] Alternatively, if Figure 3 As shown, the second side plate 120 includes a first mounting section 121 and a first connecting section 122. The first mounting section 121 and the first connecting section 122 are sequentially arranged along the height direction of the battery housing 100, and the first connecting section 122 is closer to the first side plate 110 than the first mounting section 121. For example, the first connecting section 122 is connected to the first side plate 110. In this embodiment, the first pole 141 is arranged in the first mounting section 121.

[0052] In some embodiments, please see Figure 3 The third side plate 130 includes a second mounting section 131 and a second connecting section 132. The second mounting section 131 and the second connecting section 132 are sequentially arranged along the height direction of the battery housing 100, and the second connecting section 132 is closer to the first side plate 110 than the second mounting section 131. For example, the second connecting section 132 is connected to the first side plate 110. In this embodiment, the second pole 142 is arranged in the second mounting section 131.

[0053] The second heat sink 220 and the first connecting section 122 are arranged in close contact with each other, so that the second heat sink 220 and the first pole 141 will not interfere with each other, and the installation of the first pole 141 will not be affected, thereby improving the structural reliability of the battery. The third heat sink 230 and the second connecting section 132 are arranged in close contact with each other, so that the third heat sink 230 and the second pole 142 will not interfere with each other, and the installation of the second pole 142 will not be affected.

[0054] Further optionally, if Figure 4 As shown, the second side plate 120 further includes a first transition section 123. The first installation section 121 and the first connection section 122 are connected via the first transition section 123. Figure 3 As shown, the first connecting section 122 is closer to the center line 101 of the battery housing 100 than the first mounting section 121. On the one hand, the first connecting section 122 is closer to the center line 101 of the battery housing 100 than the first mounting section 121, that is, the second side plate 120 is recessed in the direction close to the center line 101 of the battery housing 100 to form a receiving groove (not shown), and the second heat sink 220 is received in the receiving groove, so that the second heat sink 220 does not protrude from the first mounting section 121 and does not occupy space. On the other hand, the first connecting section 122 is closer to the center line 101 of the battery housing 100 than the first mounting section 121, so that the first connecting section 122 can be used to abut against the end face of the battery cell 160, thereby realizing the limiting of the battery cell 160. Among them, the center line 101 of the battery housing 100 is parallel to the height direction of the battery housing 100.

[0055] For example, the first transition section 123 is vertically connected to the first connection section 122 and the first installation section 121 , which facilitates standardized production and manufacturing of the battery housing 100 .

[0056] Alternatively, if Figure 3 As shown, the third side plate 130 also includes a second transition section 133, and the second mounting section 131 and the second connecting section 132 are connected by the second transition section 133. The second connecting section 132 is closer to the center line 101 of the battery housing 100 than the second mounting section 131. On the one hand, the second connecting section 132 is closer to the center line 101 of the battery housing 100 than the second mounting section 131, that is, the third side plate 130 is recessed in the direction close to the center line 101 of the battery housing 100 to form a receiving groove (not shown), and the third heat sink 230 is received in the receiving groove, so that the third heat sink 230 does not protrude from the second mounting section 131 and does not occupy space. On the other hand, the second connecting section 132 is closer to the center line 101 of the battery housing 100 than the second mounting section 131, so that the second connecting section 132 can be used to abut against the end surface of the battery cell 160, thereby realizing the limiting of the battery cell 160.

[0057] It should be noted that the cooperation between the second connecting section 132 and the first connecting section 122 can achieve the clamping of the battery cell 160 , and can fix the battery cell 160 during the assembly process of the battery cell 160 and in scenarios such as oscillation conditions.

[0058] For example, the second transition section 133 is vertically connected to the second connection section 132 and the second installation section 131 , which facilitates standardized production and manufacturing of the battery housing 100 .

[0059] For example, the second heat sink 220 can be offset against the first transition section 123, and / or the third heat sink 230 can be offset against the second transition section 133. On the one hand, this can increase the contact area with the heat sink and improve the heat dissipation efficiency. On the other hand, the first transition section 123 and / or the second transition section 133 can limit the installation of the second side panel 120.

[0060] In some optional embodiments, the dimension of the first transition section 123 in the length direction of the battery housing 100 can be greater than or equal to the thickness of the second heat sink 220, so that the second heat sink 220 will not protrude from the first mounting section 121 when located in the accommodating groove, so that the end surface of the battery can be relatively flat, and the setting of the second heat sink 220 will not increase the length of the battery, thereby ensuring the size of the battery.

[0061] Similarly, the dimension of the second transition section 133 in the length direction of the battery housing 100 can be greater than or equal to the thickness of the third heat sink 230, so that the third heat sink 230 will not protrude from the second mounting section 131 when located in the accommodating groove, so that the end face of the battery can be relatively flat, and the setting of the third heat sink 230 will not increase the length of the battery, thereby ensuring the size of the battery.

[0062] For example, in the length direction of the battery housing 100, the spacing between the first connecting section 122 and the first mounting section 121 is 2 mm to 10 mm. If the spacing between the first connecting section 122 and the first mounting section 121 is too large, it will affect the structural strength of the second side plate 120. If the spacing between the first connecting section 122 and the first mounting section 121 is too small, it will affect the structural strength of the first heat sink 210. For example, the spacing between the first connecting section 122 and the first mounting section 121 is 2 mm, 3 mm, 5 mm, 6 mm, 10 mm, etc. This embodiment only lists a few values ​​and is not limited thereto.

[0063] Optionally, in the length direction of the battery housing 100, the spacing between the second connecting section 132 and the second mounting section 131 is 2 mm to 10 mm. If the spacing between the second connecting section 132 and the second mounting section 131 is too large, it will affect the structural strength of the third side plate 130. If the spacing between the second connecting section 132 and the second mounting section 131 is too small, it will affect the structural strength of the third heat sink 230. For example, the spacing between the second connecting section 132 and the second mounting section 131 is 2 mm, 3 mm, 5 mm, 6 mm, 10 mm, etc. This embodiment only lists a few values ​​and is not limited thereto.

[0064] Alternatively, if Figure 5 As shown, in the height direction of the battery housing 100, the length of the first connecting section 122 is L1, the length of the second connecting section 132 is L2, the length of the second side plate 120 is L3, and the length of the third side plate 130 is L5. In the length direction of the battery housing 100, the length of the first side plate 110 is L4, wherein L1+L2+L4>1 / 2(L3+L4+L5), so that the length of the portion of the battery housing 100 that contacts the heat sink 200 is longer, so as to ensure the heat dissipation efficiency and heat dissipation effect of the heat sink 200 on the battery housing 100.

[0065] For example, the first side plate 110, the second side plate 120 and the third side plate 130 have the same width. According to the relationship “L1+L2+L4>1 / 2(L3+L4+L5)”, it can be calculated that the area of ​​the portion where the battery housing 100 contacts the heat sink 200 accounts for more than 50% of the total area of ​​the battery housing 100, which further ensures the contact area between the battery housing 100 and the heat sink 200, ensures the cooling area of ​​the battery housing 100, and improves the cooling effect on the first pole 141 and the second pole 142.

[0066] It should be noted that, since the first connecting section 122 is a part of the second side plate 120 , L1<L3 . Since the second connecting section 132 is a part of the third side plate 130 , L2<L5 .

[0067] In some optional embodiments, in the height direction of the battery housing 100, the distance between the edge of the first pole 141 near the first connecting section 122 and the edge of the first connecting section 122 near the first pole 141 is less than 10 mm, so that the heat conduction path between the first pole 141 and the first connecting section 122 is shorter, and the heat conduction efficiency is improved. It also makes the distance between the first pole 141 and the second heat sink 220 in the height direction of the battery housing 100 smaller, and improves the cooling effect of the second heat sink 220 on the first pole 141. For example, the distance between the edge of the first pole 141 near the first connecting section 122 and the edge of the first connecting section 122 near the first pole 141 is 9 mm, 8.5 mm, 5 mm, etc. This embodiment only lists a few values ​​and is not limited thereto.

[0068] Optionally, in the height direction of the battery housing 100, the distance between the edge of the second pole 142 close to the second connecting section 132 and the edge of the second connecting section 132 close to the second pole 142 is less than 10 mm, so that the heat conduction path between the second pole 142 and the second connecting section 132 is shorter, and the heat conduction efficiency is improved. It also makes the distance between the second pole 142 and the third heat sink 230 in the height direction of the battery housing 100 smaller, and improves the cooling effect of the third heat sink 230 on the second pole 142. For example, the distance between the edge of the second pole 142 close to the second connecting section 132 and the edge of the second connecting section 132 close to the second pole 142 is 9 mm, 8.5 mm, 5 mm, etc. This embodiment only lists a few values ​​and is not limited thereto.

[0069] Optionally, the first connecting section 122 and the second heat sink 220 as well as the second connecting section 132 and the third heat sink 230 are connected via a snap-on assembly, which can facilitate the assembly of the first connecting section 122 and the second heat sink 220 as well as the second connecting section 132 and the third heat sink 230 on one hand, and also facilitate the replacement or reuse of the second heat sink 220 and the third heat sink 230 on the other hand.

[0070] The specific structure of the clip assembly can be various, and this embodiment provides a clip assembly.

[0071] like Figure 2 As shown, the snap-fit ​​assembly includes a protrusion 12a and a groove 240 that cooperates with the protrusion 12a. Specifically, the protrusion 12a can be snapped into the groove 240 to achieve a snap-fit ​​connection between the component connected to the protrusion 12a and the component provided in the groove 240. In this embodiment, one of the protrusion 12a and the groove 240 is provided on the first connecting section 122 (or the second connecting section 132), and the other is provided on the second heat sink 220 (or the third heat sink 230).

[0072] In some optional embodiments, such as Figure 2 As shown, the side of the first connecting section 122 facing the second heat sink 220 and the side of the second connecting section 132 facing the third heat sink 230 are both provided with protrusions 12a. Correspondingly, the side of the second heat sink 220 facing the first connecting section 122 and the side of the third heat sink 230 facing the second connecting section 132 are both provided with grooves 240. The protrusion 12a on the first connecting section 122 is inserted into the groove 240 on the second heat sink 220, and the protrusion 12a on the second connecting section 132 is inserted into the groove 240 on the third heat sink 230.

[0073] Please continue to see Figure 2 In the thickness direction of the battery housing 100, at least one end of each groove 240 extends and penetrates the heat sink 200. When assembling the battery housing 100 and the heat sink 200, the protrusion 12a and the groove 240 can be aligned in the thickness direction of the battery housing 100 first, and then the heat sink 200 and the battery housing 100 can be controlled to approach each other in the thickness direction of the battery housing 100, so that the end of the protrusion 12a with the groove 240 is inserted into the groove 240, which facilitates the assembly of the battery housing 100 and the heat sink 200 and improves the assembly efficiency. In this embodiment, both ends of each groove 240 in the thickness direction of the battery housing 100 extend and penetrate the heat sink 200.

[0074] For example, when both grooves 240 extend at one end and penetrate the heat sink 200, the notches of the two grooves 240 on the side walls of the battery housing 100 in its thickness direction are located on the same side of the battery housing 100 to facilitate assembly of the two grooves 240 with the two protrusions 12a.

[0075] Optionally, the first connecting section 122 and the second connecting section 132 may be respectively provided with a plurality of protrusions 12a, and correspondingly, the second heat sink 220 and the third heat sink 230 may be respectively and correspondingly provided with a plurality of grooves 240 to improve the connection strength between the first connecting section 122 and the second heat sink 220, and to improve the connection strength between the second connecting section 132 and the third heat sink 230.

[0076] In some optional embodiments, such as Figure 2 or Figure 3 As shown, the battery cell 10 further includes an explosion-proof valve 150, which is disposed on the first side plate 110 and is used to exhaust and release pressure when thermal runaway occurs in the battery, thereby improving the safety of the battery. The explosion-proof valve 150 is disposed on the first side plate 110 to avoid occupying the second side plate 120 and the third side plate 130, so as to ensure the contact area between the first side plate 110 and the third side plate 130 and the heat sink 200.

[0077] Optionally, the thickness of the first mounting section 121 and the thickness of the second mounting section 131 may be greater than the thickness of other parts of the battery housing 100 , which facilitates the installation of the first pole 141 and the second pole 142 , and also improves the stability and reliability of the installation of the first pole 141 and the second pole 142 .

[0078] For example, the thickness of the first side plate 110, the thickness of the first connecting section 122, and the thickness of the second connecting section 132 are all d1, 0.3mm≤d1≤1mm, so that the first side plate 110, the first connecting section 122, and the second connecting section 132 are all relatively thin, which is conducive to the heat transfer of the first side plate 110, the first connecting section 122, and the second connecting section 132, and meets the requirements of battery lightweighting. For example, the thickness of the first side plate 110, the thickness of the first connecting section 122, and the thickness of the second connecting section 132 are all 0.3mm, 0.5mm, 0.6mm, 1mm, etc. This embodiment only lists a few values ​​and is not limited to this.

[0079] For example, the thickness of the first installation section 121 and the thickness of the second installation section 131 are both d2, d1<d2, 1.2mm≤d2≤3mm. For example, the thickness of the first installation section 121 and the thickness of the second installation section 131 are both 1.2mm, 1.5mm, 2mm, 3mm, etc. This embodiment only lists a few values ​​and is not limited thereto.

[0080] Continue, such as Figure 1 and Figure 2 As shown, the battery cell 10 further includes a shell 300, which includes a first shell plate 310, a second shell plate 320 and a third shell plate 330. The first shell plate 310 and the third shell plate 330 are arranged opposite to each other along the thickness direction of the battery housing 100, and the first shell plate 310, the second shell plate 320 and the third shell plate 330 are connected in sequence. The shell has three openings, and the second side plate 120, the first side plate 110 and the third side plate 130 respectively seal the three openings of the shell, and the shell and the cover plate form a housing cavity for housing the battery cell.

[0081] It should be noted that when the second side plate 120 includes the first installation section 121, the first transition section 123 and the first connecting section 122 connected in sequence, the end of the first shell plate 310 close to the second side plate 120 is provided with a notch that matches the first transition section 123 and the first connecting section 122, and the end of the third shell plate 330 close to the second side plate 120 is provided with a notch that matches the first transition section 123 and the first connecting section 122. Of course, when the second side plate 120 includes the first installation section 121, the first transition section 123 and the first connecting section 122 connected in sequence, the first shell plate 310 and the third shell plate 330 may also not be provided with notches.

[0082] In addition, when the third side plate includes the second mounting section 131, the second transition section 133, and the second connecting section 132 connected in sequence, the first shell plate 310 is provided with a notch matched with the second transition section 133 and the second connecting section 132 at one end close to the third side plate, and the third shell plate 330 is provided with a notch matched with the second transition section 133 and the second connecting section 132 at one end close to the third side plate. Of course, when the third side plate includes the second mounting section 131, the second transition section 133, and the second connecting section 132 connected in sequence, the first shell plate 310 and the third shell plate 330 may also be provided with no notch.

[0083] It should also be noted that the shell 300 can be an integrally molded structure, for example, the first shell plate 310 and the second shell plate 320 are integrally molded, and the second shell plate 320 and the third shell plate 330 are integrally molded; the shell can also be a split structure, for example, the first shell plate 310 and the second shell plate 320 are welded, and the second shell plate 320 and the third shell plate 330 are welded.

[0084] Continue, such as Figure 2 and Figure 6 As shown, the battery cell 10 also includes a battery cell 160. In the height direction of the battery housing 100, the battery cell 160 has a first end face (not shown) arranged opposite to the first side plate 110 and a second end face 161 arranged away from the first end face. The second end face 161 of the battery cell 160 leads to a first pole lug 162 and a second pole lug 163 with opposite polarities. The first pole lug 162 is connected to the first pole post 141 through the first adapter plate 171; the second pole post 142 is connected to the second pole post 142 through the second adapter plate 172. The first adapter plate 171 and the second adapter plate 172 are both "L"-shaped, so that the first pole lug 162 and the second pole lug 163 located on the second end face 161 can be connected to the first pole post 141 and the second pole post 142 correspondingly.

[0085] In some optional embodiments, such as Figure 6 As shown, the battery cell 10 may be provided with one. In some other optional embodiments, as Figure 7 As shown, there are multiple battery cells 10, and the multiple battery cells 10 are arranged in sequence along the thickness direction thereof, and there can be one heat sink 200, and the second heat sink 220 of the heat sink 200 is in contact with the multiple second side plates 120, the first heat sink 210 of the heat sink 200 is in contact with the multiple first side plates 110, and the third heat sink 230 of the heat sink 200 is in contact with the multiple third side plates 130, which improves the integrity of the battery and facilitates the assembly of the battery as a whole in the electrical device. Of course, it can be understood that there can be multiple heat sinks 200 corresponding to the battery cells 10, and each heat sink 200 is in contact with the battery housing 100 of the corresponding battery cell 10.

[0086] In a battery provided in this embodiment, the second heat sink 220 of the heat sink 200 is in direct contact with the second side plate 120 where the first pole 141 is provided, and the third heat sink 230 is in direct contact with the third side plate 130 where the second pole 142 is provided, thereby improving the heat dissipation efficiency of the first pole 141, the second pole 142, the first adapter plate 171 and the second adapter plate 172, and not occupying external space; and since the first connecting section 122, the second connecting section 132 and the first side plate 110 do not bear the sealing force of the pole and the force of the adapter plate on the pole, the first connecting section 122, the second connecting section 132 and the first side plate 110 can be thinner, which is conducive to the lightweight of the battery. In addition, the first connecting section 122 and the second connecting section 132 can fix the battery cell 160 in the battery cell 160 assembly scenario or the oscillation working condition scenario, thereby improving the stability of the battery cell 160.

[0087] The battery assembly method provided in this embodiment is as follows:

[0088] like Figure 8 As shown, the plate 20 used to form the battery housing 100 is in the shape of a long strip, and the plate 20 can be bent to form the battery housing 100. In this embodiment, the plate can be bent after the first pole 141 and the second pole 142 are installed, or the first pole 141 and the second pole 142 can be installed after bending. The explosion-proof valve 150, the first adapter plate 171 and the second adapter plate 172 can be installed on the battery housing 100 before bending to reduce the difficulty of assembly.

[0089] After the bending is completed, the first side panel 110, the second side panel 120 and the third side panel 130 are formed, wherein the first side panel 110 forms a certain angle with the second side panel 120 and the third side panel 130. In this embodiment, the first side panel 110 is perpendicular to the second side panel 120 and the third side panel 130.

[0090] Next, the first pole 141 on the second side plate 120 is connected to the first adapter plate 171, and the second pole 142 on the third side plate 130 is connected to the second adapter plate 172, and then the battery cell 160 is placed in the installation space formed by the first side plate 110, the second side plate 120 and the third side plate 130, and the two ends of the battery cell 160 in the length direction of the battery housing 100 are positioned by the first connecting segment 122 and the second connecting segment 132, and the two ends of the battery cell 160 in the height direction of the battery housing 100 are positioned by the first adapter plate 171 and the second adapter plate 172; then the first pole ear 162 of the battery cell 160 is connected to the first adapter plate 171, and the second pole ear 163 of the battery cell 160 is connected to the second adapter plate 172. Finally, the battery cell 160 is installed in the housing 300, and the housing 300 is welded to the second side plate 120, the third side plate 130, and the first side plate 110. It should be noted that the protrusion 12 a is arranged to protrude from the outer shell 300 in the length direction of the battery shell so as to be engaged with the heat sink 200 .

[0091] Next, the heat sink 200 is installed. The heat sink 200 is installed from the thickness direction of the battery housing 100 so that the protrusions 12 a are inserted into the corresponding slots 240 to achieve the snap connection between the heat sink 200 and the battery housing 100 .

[0092] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery, characterized in that: include: A battery cell (10), comprising a battery housing (100), the battery housing (100) comprising a cover plate, the cover plate comprising a first side plate (110), a second side plate (120) and a third side plate (130) arranged opposite to each other along the length direction of the battery housing (100), the second side plate (120), the first side plate (110) and the third side plate (130) being sequentially connected to form a first U-shaped frame structure; a first pole (141) is arranged on the second side plate (120), and a second pole (142) is arranged on the third side plate (130); A heat sink (200), the heat sink (200) comprising a first heat sink (210), a second heat sink (220) and a third heat sink (230), the second heat sink (220), the first heat sink (210) and the third heat sink (230) being sequentially connected to form a second U-shaped frame structure, the second heat sink (220) being attached to the second side plate (120), the first heat sink (210) being attached to the first side plate (110), and the third heat sink (230) being attached to the third side plate (130).

2. The battery according to claim 1, characterized in that The second side plate (120) comprises a first mounting section (121) and a first connecting section (122), and the first pole (141) is arranged on the first mounting section (121); the third side plate (130) comprises a second mounting section (131) and a second connecting section (132), and the second pole (142) is arranged on the second mounting section (131); the first side plate (110) connects the first connecting section (122) and the second connecting section (132); the second heat sink (220) and the first connecting section (122) are arranged in close contact with each other; and the third heat sink (230) and the second connecting section (132) are arranged in close contact with each other.

3. The battery according to claim 2, characterized in that The second side plate (120) further comprises a first transition section (123), and the first mounting section (121) and the first connecting section (122) are connected via the first transition section (123); the third side plate (130) further comprises a second transition section (133), and the second mounting section (131) and the second connecting section (132) are connected via the second transition section (133); the first connecting section (122) is closer to the center line (101) of the battery housing (100) than the first mounting section (121), and the second connecting section (132) is closer to the center line (101) of the battery housing (100) than the second mounting section (131), wherein the center line (101) of the battery housing (100) is parallel to the height direction of the battery housing (100).

4. The battery according to claim 3, characterized in that In the length direction of the battery housing (100), the spacing between the first connecting section (122) and the first mounting section (121) and the spacing between the second connecting section (132) and the second mounting section (131) are both 2 mm to 10 mm.

5. The battery according to claim 3, characterized in that In the height direction of the battery housing (100), the length of the first connecting section (122) is L1, the length of the second connecting section (132) is L2, the length of the second side plate (120) is L3, and the length of the third side plate (130) is L5; in the length direction of the battery housing (100), the length of the first side plate (110) is L4, wherein L1+L2+L4>1 / 2(L3+L4+L5), L1<L3, L2<L5.

6. The battery according to claim 3, characterized in that In the height direction of the battery housing (100), the distance between the edge of the first pole (141) close to the first connecting section (122) and the edge of the first connecting section (122) close to the first pole (141) is less than 10 mm; the distance between the edge of the second pole (142) close to the second connecting section (132) and the edge of the second connecting section (132) close to the second pole (142) is less than 10 mm.

7. The battery according to claim 2, characterized in that The first connecting section (122) and the second heat sink (220) as well as the second connecting section (132) and the third heat sink (230) are all connected via a snap-on assembly.

8. The battery according to claim 7, characterized in that The snap-on assembly comprises a protrusion (12a) and a groove (240) matched with the protrusion (12a); the side of the first connecting section (122) facing the second heat sink (220) and the side of the second connecting section (132) facing the third heat sink (230) are both provided with a protrusion (12a); the side of the second heat sink (220) facing the first connecting section (122) and the side of the third heat sink (230) facing the second connecting section (132) are both provided with a groove (240), wherein, in the thickness direction of the battery housing (100), at least one end of the groove (240) extends and passes through the heat sink (200).

9. The battery according to claim 3, characterized in that The battery cell (10) further comprises an explosion-proof valve (150), wherein the explosion-proof valve (150) is arranged on the first side plate (110); The thickness of the first side plate (110), the thickness of the first connecting section (122), and the thickness of the second connecting section (132) are all d1, 0.3 mm ≤ d1 ≤ 1 mm; The thickness of the first installation section (121) and the thickness of the second installation section (131) are both d2, d1<d2, 1.2mm≤d2≤3mm.

10. The battery according to claim 1, characterized in that The battery cell (10) further comprises a battery cell (160). In the height direction of the battery housing (100), the battery cell (160) comprises a first end face arranged opposite to the first side plate (110) and a second end face (161) arranged away from the first end face. The second end face (161) of the battery cell (160) leads to a first pole lug (162) and a second pole lug (163) with opposite polarities. The first pole lug (162) is connected to the first pole post (141) via a first adapter sheet (171); and the second pole post (142) is connected to the second pole post (142) via a second adapter sheet (172).

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