Battery pack and electric equipment with same

Abstract

The invention discloses a battery pack and electric equipment with the battery pack, the battery pack comprises a battery monomer and a heat exchange assembly, the battery monomer is provided with a battery main body and a tab connected with the battery main body, the heat exchange assembly is detachably arranged on the battery monomer, and the heat exchange assembly exchanges heat with the battery main body and the tab respectively. According to the battery pack provided by the embodiment of the invention, the temperature adjustment efficiency can be improved while the temperature of the single batteries is adjusted, the heat exchange assembly is convenient to maintain, replace and the like, and the maintenance difficulty and the maintenance cost of the heat exchange assembly are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack and an electrical device having the same. Background Art

[0002] A battery pack usually has multiple battery cells. Since the battery cells generate heat during operation, in order to reduce the impact of heat on the battery cells, a heat exchanger is usually provided to exchange heat with the battery cells so that the temperature of the battery cells during operation can be maintained within a suitable temperature range, thereby improving the safety of the battery cells and helping to extend the service life of the battery cells.

[0003] However, when existing heat exchangers dissipate heat from battery cells, not only is the heat dissipation efficiency low, it may also cause a large temperature gradient inside the battery cell, which in turn causes inconsistent decay rates in various parts of the battery cell, seriously affecting the service life of the battery cell. In addition, existing heat exchangers are difficult to repair and replace. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery pack, which, while avoiding a large temperature gradient inside a battery cell, is also convenient for the repair and replacement of a heat exchanger, reduces the maintenance difficulty and maintenance cost of the heat exchanger, and solves the technical problems in the prior art that the heat exchanger has low heat dissipation efficiency when dissipating heat from a battery cell and is difficult to repair and replace.

[0005] The present invention also aims to provide an electrical device having the above-mentioned battery pack.

[0006] A battery pack according to an embodiment of the present invention includes: a battery cell having a battery body and a tab connected to the battery body; a heat exchange component detachably disposed on the battery cell, and the heat exchange component exchanges heat with the battery body and the tab respectively.

[0007] According to the battery pack of the embodiment of the present invention, the heat exchange component is detachably provided on the battery cell so that the heat exchange component can be removed relative to the battery cell, thereby realizing the repair and replacement of the heat exchange component without damaging the battery pack structure, thereby reducing the maintenance difficulty of the heat exchange component; at the same time, by arranging the heat exchange component to exchange heat with the battery body and the tab respectively, the battery cell is zoned for thermal management, the heat exchange efficiency of the battery cell is improved, and the temperature difference of each area of ​​the battery cell can be ensured to be within a reasonable range to a certain extent, thereby avoiding the generation of a large temperature gradient inside the battery cell, while extending the service life of the battery cell, and also improving the safety of the battery cell. In other words, the battery pack of the present application can not only improve the heat exchange efficiency of the battery cell, but also avoid the generation of a large temperature gradient inside the battery cell to a certain extent, while reducing the difficulty of repairing and replacing the heat exchange component.

[0008] In some embodiments, the heat exchange assembly includes a first heat exchange member and a second heat exchange member, wherein the first heat exchange member is movably disposed on the tab, and the second heat exchange member is movably disposed on the battery body.

[0009] In some embodiments, at least part of the first heat exchange member is arranged on opposite sides of the pole ear in the first direction to limit the displacement of the pole ear in the first direction; the first heat exchange member is movably matched with the pole ear along the second direction and / or the third direction, and the first direction, the second direction and the third direction intersect.

[0010] In some embodiments, a limiting member is provided between the pole tab and the first heat exchange member, and the limiting member cooperates with the pole tab to limit the displacement of the pole tab in the first direction.

[0011] In some embodiments, the limiting member is a thermally conductive insulating member.

[0012] In some embodiments, at least part of the first heat exchange member protrudes away from the pole ear to form a heat exchange cavity facing the pole ear, the heat exchange cavity opens toward one side of the pole ear, and the pole ear is arranged in the heat exchange cavity through the opening.

[0013] In some embodiments, the battery body is provided with the pole ears at both opposite ends in the second direction, and the first heat exchange member is provided with a plurality of the heat exchange cavities corresponding one-to-one to the pole ears.

[0014] In some embodiments, the pole lug extends along the third direction, the heat exchange cavity is provided with a first opening at at least one end in the third direction, and the first heat exchange element is movably matched with the pole lug through the first opening.

[0015] In some embodiments, in the third direction, an extension length of the heat exchange cavity is smaller than an extension length of the electrode tab.

[0016] In some embodiments, the tabs are disposed at opposite ends of the battery body in the second direction, the second heat exchange element is movably matched with the battery body along the first direction and / or the third direction, and the first direction, the second direction and the third direction intersect.

[0017] In some embodiments, the second heat exchange member cooperates with at least one side wall of the battery body for heat exchange.

[0018] In some embodiments, the second heat exchange member includes two heat exchange plates arranged opposite to each other, the two heat exchange plates are connected to each other through a connecting plate, the two heat exchange plates and the connecting plate cooperate to enclose a heat exchange space for accommodating the battery body, and at least part of the battery cells are arranged in the heat exchange space.

[0019] In some embodiments, the heat exchange space has a second open opening on a side facing the heat exchange plate, and the second heat exchange element is movably matched with the battery body through the second open opening.

[0020] In some embodiments, the second heat exchange element includes a plurality of heat exchange bodies, each of the heat exchange bodies includes two heat exchange plates and the connecting plate, the plurality of heat exchange bodies are arranged at intervals along the second direction, and two adjacent heat exchange bodies are connected to each other.

[0021] In some embodiments, the heat exchange component is formed as a heat exchange plate, which is hollow inside and has a plurality of guide plates arranged at intervals to separate a plurality of guide cavities extending along the guide direction thereof in the heat exchange component.

[0022] In some embodiments, a first accommodating space is formed in the first heat exchange member, the first heat exchange member has a first inlet and a first outlet, the first inlet and the first outlet are connected at opposite ends of the first accommodating space, the first inlet is used to guide the heat exchange medium into the first accommodating space, and the first outlet is used to export the heat exchange medium in the first accommodating space; a second accommodating space is formed in the second heat exchange member, the second heat exchange member has a second inlet and a second outlet, the second inlet is used to guide the heat exchange medium into the second accommodating space, and the second outlet is used to export the heat exchange medium in the second accommodating space.

[0023] In some embodiments, the first inlet, the first outlet, the second inlet, and the second outlet are located on the same side of the battery cell.

[0024] In some embodiments, the battery pack further includes a frame, the frame enclosing a receiving cavity, and the battery cells and the heat exchange assembly are both disposed in the receiving cavity.

[0025] In some embodiments, a guide member is provided between the frame and the heat exchange assembly, and the guide member is used to guide the movement of the heat exchange assembly; the guide member is also used to limit the displacement of the heat exchange assembly in a non-moving direction.

[0026] In some embodiments, the guide member includes a guide protrusion and a guide groove extending along the moving direction of the heat exchange component, the guide protrusion is provided in one of the frame and the heat exchange component, the guide groove is provided in the other of the frame and the heat exchange component, and the guide protrusion is movably provided in the guide groove.

[0027] In some embodiments, the guide protrusion is provided on the heat exchange component and is formed as an integral part with the heat exchange component.

[0028] In some embodiments, the guide groove has a constricted opening on one side facing the frame or the heat exchange component to limit the displacement of the heat exchange component in the non-moving direction.

[0029] In some embodiments, the frame body further encloses a third opening communicating with the accommodating cavity, and the second heat exchange element is detachably matched with the battery body through the third opening.

[0030] In some embodiments, the battery pack includes multiple groups of battery cell groups, and the multiple groups of battery cell groups are arranged along a second direction. Each group of the battery cell groups has multiple battery cells arranged along a first direction, and the first direction intersects with the second direction; the first heat exchange element includes multiple first heat exchange elements, and the multiple first heat exchange elements correspond one-to-one to the multiple groups of battery cell groups. The first heat exchange element is arranged around the periphery of the battery cell group.

[0031] In some embodiments, two adjacent first heat exchange elements are interconnected.

[0032] An electric device according to an embodiment of the present invention includes the aforementioned battery pack.

[0033] According to the electric equipment of the embodiment of the present invention, the battery pack can be used to power the electric equipment, thereby ensuring the working performance of the electric equipment to a certain extent and reducing the difficulty of maintaining the electric equipment to a certain extent.

[0034] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 Exploded diagram of a battery pack according to some embodiments of the present invention.

[0037] Figure 2 for Figure 1 A partial enlarged view of area I in the middle.

[0038] Figure 3 for Figure 1 A partial enlarged view of the middle area II.

[0039] Figure 4 Schematic diagram of a battery cell according to some embodiments of the present invention.

[0040] Figure 5 for Figure 1 A top view of the battery pack without the cover.

[0041] Figure 6 for Figure 5 A partial enlarged view of area III in the middle.

[0042] Figure 7 for Figure 5 A partial enlarged view of the middle region IV.

[0043] Figure 8 Schematic diagram of a first heat exchange element according to some embodiments of the present invention.

[0044] Fig. 9 for Figure 8 A partial enlarged view of the middle region V.

[0045] Fig.10 for Figure 8 Sectional view along line AA.

[0046] Fig.11 for Figure 1 A three-dimensional schematic diagram of the battery pack without the cover.

[0047] Fig.12 for Figure 1 A three-dimensional schematic diagram of the battery pack.

[0048] Fig.13 for Fig.12 A partial enlarged view of area VI in the middle.

[0049] Fig.14 Schematic diagram of a second heat exchange element according to some embodiments of the present invention.

[0050] Fig.15 for Fig.14 Sectional view along line BB.

[0051] Reference numerals:

[0052] 1000, battery pack;

[0053] 100. Battery monomer group;

[0054] 110, battery cell; 111, battery body; 112, tab;

[0055] 200. Heat exchange component;

[0056] 210, a first heat exchange element;

[0057] 211, heat exchange chamber; 2111, first open port;

[0058] 212, first import;

[0059] 213. First exit;

[0060] 220, second heat exchange element;

[0061] 221, heat exchange plate;

[0062] 222, connecting plate;

[0063] 223, heat exchange space; 2231, second open port;

[0064] 224. Heat exchange body;

[0065] 225. Second import;

[0066] 226, Second Exit;

[0067] 230, guide plate;

[0068] 240, diversion cavity;

[0069] 300, limiter;

[0070] 400, frame; 410, cover plate; 420, side beam; 430, longitudinal beam;

[0071] 500, guide member; 510, guide protrusion; 520, guide groove. DETAILED DESCRIPTION

[0072] Embodiments of the present invention are described in detail below, examples of which 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.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] At present, liquid cooling or air cooling is commonly used in the market to remove the heat of battery cells. However, since the battery cell is a composite structure composed of three layers of components, namely the positive electrode, the diaphragm and the negative electrode, and the thermal conductivity of the diaphragm is poor, the above heat dissipation method will cause the thermal conductivity of the battery cell in the direction perpendicular to the pole piece to be significantly lower than the thermal conductivity in the direction parallel to the pole piece, affecting the heat dissipation efficiency. It may also produce a large temperature gradient inside the battery cell, which will lead to inconsistent decay rates in various parts of the battery cell, seriously affecting the service life of the battery cell.

[0075] Studies have shown that because the positive and negative tabs of the battery cell are directly connected to the positive and negative current collectors, heat can be directly conducted out of the battery cell through the positive and negative tabs, thereby greatly improving the heat dissipation efficiency and reducing the temperature gradient inside the battery cell.

[0076] Therefore, zoned thermal management of tab heat dissipation and battery body heat dissipation is a good choice for the next generation of advanced battery thermal management systems.

[0077] At the same time, existing heat exchangers are difficult to adjust once assembled. If the pipes of the heat exchangers are damaged, the battery cell group needs to be disassembled to inspect the pipes. It is impossible to repair or replace a single pipe without damaging the layout of the battery cell group, which increases the maintenance difficulty and cost of the heat exchangers.

[0078] To solve the above problems, Figure 1 As shown, the present application proposes a battery pack 1000, which can not only realize zoned thermal management of the battery body 111 and the tab 112 of the battery cell 110, but also repair or replace the heat exchange assembly 200 without damaging the layout of the battery cell group 100, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange assembly 200.

[0079] The battery pack 1000 according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0080] like Figure 1As shown, a battery pack 1000 according to an embodiment of the present invention includes: a battery cell 110 and a heat exchange assembly 200 .

[0081] Among them, combined Figure 1 , Figure 2 and Figure 4 As shown, the battery cell 110 has a battery body 111 and a tab 112 connected to the battery body 111. The battery body 111 and the tab 112 cooperate to enable the electrical device to be electrically connected to the battery cell 110 through the tab 112, thereby facilitating the use of the battery cell 110 to power the electrical device, thereby ensuring the working performance of the battery cell 110 to a certain extent.

[0082] The heat exchange assembly 200 is detachably provided on the battery cell 110, and the heat exchange assembly 200 respectively exchanges heat with the battery body 111 and the tab 112. The heat exchange assembly 200 is used to adjust the temperature of the battery body 111 and the tab 112 respectively, so as to achieve the purpose of zoned thermal management of the battery cell 110, which can not only improve the heat exchange efficiency of the battery cell 110, but also avoid a large temperature gradient inside the battery cell 110 to a certain extent, thereby extending the service life of the battery cell 110.

[0083] It should be noted that the heat exchange between the heat exchange component 200 and the battery body 111 and the tab 112 means that the heat exchange component 200 can increase the temperature of the battery body 111 and the tab 112 , and can also reduce the temperature of the battery body 111 and the tab 112 .

[0084] In a specific example, when the temperature of the battery cell 110 during operation is lower than a preset temperature, the heat exchange assembly 200 can be used to increase the temperature of the battery body 111 and the tab 112 to achieve the purpose of increasing the temperature of the battery cell 110; when the temperature of the battery cell 110 during operation is higher than the preset temperature, the heat exchange assembly 200 can be used to reduce the temperature of the battery body 111 and the tab 112 to achieve the purpose of reducing the temperature of the battery cell 110, so that the temperature of the battery cell 110 during operation can be maintained within an appropriate temperature range, while ensuring the working performance of the battery cell 110, the service life of the battery cell 110 can also be extended, thereby extending the service life of the battery pack 1000.

[0085] At the same time, by detachably arranging the heat exchange assembly 200 on the battery cell 110, the heat exchange assembly 200 can be removed relative to the battery cell 110, and then the heat exchange assembly 200 can be repaired or replaced without destroying the layout of the battery cell 110, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange assembly 200.

[0086] It can be seen from the above structure that the battery pack 1000 of the embodiment of the present invention, by setting a heat exchange component 200, can realize the use of the heat exchange component 200 to adjust the temperature of the battery cell 110, so that the temperature of the battery cell 110 during operation can be maintained within a suitable temperature range, so as to ensure the working performance of the battery cell 110 to a certain extent, and extend the service life of the battery cell 110, thereby extending the service life of the battery pack 1000.

[0087] At the same time, by configuring the heat exchange assembly 200 to respectively exchange heat with the battery body 111 and the tab 112, the purpose of performing zoned thermal management of the battery cell 110 using the heat exchange assembly 200 is achieved. This not only can adjust the temperature of the battery cell 110, but also can improve the heat exchange efficiency of the battery cell 110, and to a certain extent avoid the generation of a large temperature gradient inside the battery cell 110, thereby further extending the service life of the battery cell 110.

[0088] In addition, the present application also detachably arranges the heat exchange assembly 200 on the battery cell 110 to achieve detachable cooperation between the heat exchange assembly 200 and the battery cell 110, and further achieves that the heat exchange assembly 200 can be removed relative to the battery cell 110. In this way, the heat exchange assembly 200 can be repaired or replaced without destroying the layout of the battery cell 110, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange assembly 200.

[0089] It can be understood that compared with the prior art, the battery pack 1000 of the present application can not only adjust the temperature of the battery cell 110, but also improve the temperature regulation efficiency of the battery cell 110, and facilitate the repair and replacement of the heat exchange assembly 200, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange assembly 200.

[0090] In some embodiments, the heat exchange component 200 is formed as a heat exchange plate, which is hollow inside and suitable for being filled with a heat exchange medium (such as water, coolant, etc.). The heat exchange medium is used for heat exchange with the battery body 111 and the tab 112 to achieve heat exchange between the heat exchange component 200 and the battery body 111 and the tab 112. This makes it convenient to use the heat exchange component 200 to adjust the temperature of the battery body 111 and the tab 112. While ensuring that the temperature of the battery cell 110 can be maintained within a suitable temperature range, it can also improve the heat exchange efficiency of the battery cell 110, and to a certain extent avoid the generation of a large temperature gradient inside the battery cell 110, thereby extending the service life of the battery cell 110.

[0091] In some embodiments, the heat exchange component 200 is made of aluminum alloy, so that the heat exchange component 200 has the advantages of high thermal conductivity and low density, thereby improving the working performance of the heat exchange component 200.

[0092] In some embodiments, in combination Figure 1, Figure 4 and Figure 5 As shown, the heat exchange assembly 200 includes a first heat exchange member 210 and a second heat exchange member 220. The first heat exchange member 210 is movably disposed on the pole ear 112, and the second heat exchange member 220 is movably disposed on the battery body 111. The heat exchange assembly 200 is movably disposed on the battery cell 110, so that the heat exchange assembly 200 can be easily disassembled relative to the battery cell 110, and the heat exchange assembly 200 can be repaired or replaced without damaging the layout of the battery cell 110, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange assembly 200.

[0093] At the same time, by movably arranging the first heat exchange element 210 on the pole ear 112 and movably arranging the second heat exchange element 220 on the battery body 111, the heat exchange assembly 200 can also be heat-exchanged with the battery body 111 and the pole ear 112 respectively, so as to achieve the purpose of zoned thermal management of the battery cell 110, thereby improving the heat exchange efficiency of the battery cell 110, and avoiding the generation of a large temperature gradient inside the battery cell 110 to a certain extent, thereby extending the service life of the battery cell 110.

[0094] In addition, by configuring the heat exchange assembly 200 to include a first heat exchange component 210 and a second heat exchange component 220 , the difficulty of matching the heat exchange assembly 200 with the battery cell 110 can be reduced, thereby ensuring the working performance of the heat exchange assembly 200 to a certain extent.

[0095] In some embodiments, in combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, at least part of the first heat exchange element 210 is disposed on opposite sides of the pole ear 112 in the first direction to limit the displacement of the pole ear 112 in the first direction. Figure 1 and Figure 5 That is, at least part of the first heat exchange element 210 is arranged on the opposite sides of the pole lug 112 in the Y direction, so that the first heat exchange element 210 can not only exchange heat with the pole lug 112, but also limit the displacement of the pole lug 112 in the Y direction, so as to achieve the purpose of fixing the pole lug 112, so as to improve the position stability of the pole lug 112, and then improve the position stability of the battery cell 110, so as to ensure the working performance of the battery cell 110 to a certain extent.

[0096] Optionally, the first heat exchange element 210 is movably matched with the pole ear 112 along the second direction and / or the third direction, and the first direction, the second direction and the third direction intersect. Figure 1 and Figure 5 The X direction shown in the figure, the third direction can be understood as Figure 1 That is to say, the first heat exchanger 210 can be movably matched with the pole lug 112 along the X direction, can be movably matched with the pole lug 112 along the Z direction, or can be movably matched with the pole lug 112 along the X direction and the Z direction at the same time, so that the direction in which the first heat exchanger 210 limits the displacement of the pole lug 112 intersects with the moving direction of the first heat exchanger 210. In this way, while the first heat exchanger 210 is used to limit the displacement of the pole lug 112, it is also convenient to disassemble the first heat exchanger 210 relative to the pole lug 112, thereby reducing the maintenance difficulty and maintenance cost of the first heat exchanger 210.

[0097] In the description of the present invention, features defined as “first”, “second”, and “third” may explicitly or implicitly include one or more such features, and are used to distinguish and describe the features, without any distinction of order or importance.

[0098] In some embodiments, in combination Figure 5 , Figure 6 and Figure 7 As shown, a limiting member 300 is provided between the pole tab 112 and the first heat exchange member 210, and the limiting member 300 cooperates with the pole tab 112 to limit the displacement of the pole tab 112 in the first direction. The displacement of the pole tab 112 in the first direction is further limited, the limiting strength is improved, and the position stability of the pole tab 112 is further improved, thereby ensuring the working performance of the pole tab 112 to a certain extent.

[0099] In some embodiments, the stopper 300 is a heat-conducting insulating member. In this way, on the one hand, the stopper 300 can be prevented from affecting the heat exchange efficiency between the tab 112 and the first heat exchange member 210, so as to achieve the purpose of adjusting the temperature of the tab 112 by using the first heat exchange member 210. On the other hand, the tab 112 can be prevented from being electrically connected to the stopper 300 and / or the first heat exchange member 210, so as to prevent the battery cell 110 from being short-circuited, thereby ensuring the working performance and safety of the battery cell 110 to a certain extent.

[0100] That is to say, the limiting member 300 of the present application can not only further improve the position stability of the pole tab 112 , but also prevent the pole tab 112 from forming an electrical connection with the limiting member 300 and / or the first heat exchange member 210 .

[0101] In some embodiments, the limit member 300 can be supported by materials such as silicone and rubber, so that the limit member 300 has good thermal conductivity and insulation, thereby forming the limit member 300 into a thermally conductive insulating member, ensuring that the limit member 300 can effectively transfer the heat at the pole ear 112 to the first heat exchange member 210 and prevent the battery cell 110 from short-circuiting.

[0102] In some embodiments, in combination Figure 5 , Figure 7 , Figure 8 and Fig. 9 As shown, at least part of the first heat exchange member 210 protrudes in a direction away from the pole lug 112 to form a heat exchange cavity 211 facing the pole lug 112, and the heat exchange cavity 211 opens toward one side of the pole lug 112, and the pole lug 112 is disposed in the heat exchange cavity 211 through the opening. In this way, at least part of the first heat exchange member 210 is disposed on opposite sides of the pole lug 112 in the first direction, thereby achieving heat exchange between the first heat exchange member 210 and the pole lug 112, and the first heat exchange member 210 can be used to limit the displacement of the pole lug 112 in the first direction, thereby improving the position stability of the pole lug 112.

[0103] At the same time, by providing a heat exchange cavity 211 with an opening, the difficulty of matching the first heat exchange element 210 with the pole lug 112 can be reduced, and the contact area between the first heat exchange element 210 and the pole lug 112 can be increased, thereby improving the heat exchange efficiency between the first heat exchange element 210 and the pole lug 112.

[0104] In some embodiments, in combination Figure 5 , Figure 6 and Figure 7 As shown, both opposite ends of the battery body 111 in the second direction are provided with pole ears 112, and the first heat exchange member 210 is provided with a plurality of heat exchange cavities 211 corresponding one to one with the pole ears 112. Here, it means that when both opposite ends of the battery body 111 in the second direction are provided with pole ears 112, a plurality of heat exchange cavities 211 are provided in the first heat exchange member 210, and the plurality of heat exchange cavities 211 correspond one to one with the plurality of pole ears 112, so that one first heat exchange member 210 can simultaneously perform heat exchange with a plurality of pole ears 112, which can improve the heat exchange efficiency of the battery cell 110, simplify the number of the first heat exchange members 210, and reduce the difficulty of disassembling and assembling the first heat exchange members 210.

[0105] In some embodiments, in combination Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, the pole lug 112 extends along the third direction, and the heat exchange cavity 211 is provided with a first open port 2111 at least at one end in the third direction, and the first heat exchange element 210 is movably matched with the pole lug 112 through the first open port 2111. Thus, the first heat exchange element 210 and the pole lug 112 are detachably matched, so that the first heat exchange element 210 can be removed relative to the pole lug 112 along the third direction, which is convenient for repairing or replacing the first heat exchange element 210 without damaging the layout of the battery cell 110, thereby reducing the maintenance difficulty and maintenance cost of the first heat exchange element 210.

[0106] In some embodiments, the heat exchange cavity 211 is provided with first open openings 2111 at two opposite ends in the third direction, so as to further reduce the difficulty of disassembling the first heat exchange element 210 relative to the tab 112 .

[0107] In some embodiments, in combination Figure 8 and Fig. 9 As shown, a first accommodation space is formed in the first heat exchanger 210, and the first heat exchanger 210 has a first inlet 212 and a first outlet 213. The first inlet 212 and the first outlet 213 are connected to the opposite ends of the first accommodation space. The first inlet 212 is used to guide the heat exchange medium into the first accommodation space, and the first outlet 213 is used to guide the heat exchange medium in the first accommodation space. In this way, the heat exchange medium in the first heat exchanger 210 can flow along the extension direction of the first heat exchanger 210 to achieve heat exchange with the pole ear 112, so as to achieve the purpose of adjusting the temperature of the pole ear 112. At the same time, the heat exchange medium after heat exchange can be discharged through the first outlet 213 to achieve the circulation of the heat exchange medium in the first heat exchanger 210, improve the heat exchange effect of the heat exchange medium, and then improve the heat exchange effect of the first heat exchanger 210, so that the temperature of the pole ear 112 can be effectively maintained within a suitable temperature range.

[0108] In some embodiments, in combination Figure 8 , Fig.10 , Fig.14 and Fig.15 As shown, the heat exchange assembly 200 is formed as a heat exchange plate, which is hollow inside and has a plurality of guide plates 230 arranged at intervals inside the heat exchange plate, so as to separate a plurality of guide cavities 240 extending along the guide direction thereof inside the heat exchange assembly 200. This plays a role in diverting the heat exchange medium, which is conducive to reducing the flow resistance, so that the heat exchange medium can effectively circulate in the heat exchange assembly 200, and further improve the heat exchange effect of the heat exchange assembly 200.

[0109] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0110] In a specific example, combined with Figure 8 , Fig. 9 and Fig.10 As shown, a plurality of guide plates 230 are provided in the first heat exchange element 210. The plurality of guide plates 230 are used to separate a plurality of guide chambers 240 in the first heat exchange element 210, thereby playing a role in diverting the heat exchange medium, which is beneficial to reducing flow resistance, so that the heat exchange medium can effectively circulate in the first heat exchange element 210, and further improve the heat exchange effect of the first heat exchange element 210.

[0111] In some embodiments, the guide plate 230 in the first heat exchange element 210 is made of metal material so that the guide plate 230 has high thermal conductivity, so that the heat transfer performance of the first heat exchange element 210 can be improved by setting the guide plate 230, and the heat exchange effect of the first heat exchange element 210 can be further improved.

[0112] It should be noted that, because the first heat exchange element 210 has a plurality of heat exchange chambers 211, the first heat exchange element 210 has a plurality of corners (such as Fig. 9 As shown), the corner will increase the flow resistance of the heat exchange medium in the first heat exchange element 210, affecting the circulation flow of the heat exchange medium in the first heat exchange element 210, thereby affecting the heat exchange effect of the first heat exchange element 210.

[0113] To solve the above problems, Figure 6 , Figure 7 and Fig. 9 As shown, chamfers are provided at the corners of the first heat exchange element 210 to reduce the flow resistance of the heat exchange medium in the first heat exchange element 210 , so that the heat exchange medium can effectively circulate in the first heat exchange element 210 , thereby improving the heat exchange effect of the first heat exchange element 210 .

[0114] In some embodiments, the first heat exchanger 210 is formed by extrusion and then bending, so that the first heat exchanger 210 is formed as an integral part, which reduces the difficulty of forming the first heat exchanger 210 and ensures the structural strength of the first heat exchanger 210 to a certain extent, thereby extending the service life of the first heat exchanger 210.

[0115] Of course, in some other embodiments, the first heat exchange element 210 may also be formed by injection molding.

[0116] In some embodiments, in combination Fig. 9 , Fig.12 and Fig.13 As shown, in the third direction, the extension length of the heat exchange cavity 211 is less than the extension length of the pole lug 112. So that the extension length of the first heat exchange member 210 in the third direction is less than the extension length of the pole lug 112, so that when the pole lug 112 is arranged in the heat exchange cavity 211, in the third direction, part of the pole lug 112 is exposed, which facilitates the electrical connection between the battery cells 110.

[0117] The electrical connection between the battery cells 110 mentioned here may be in series or in parallel, and no specific limitation is made here.

[0118] In some embodiments, in combination Figure 1 , Figure 2 and Figure 4As shown, the tabs 112 are arranged at opposite ends of the battery body 111 in the second direction, and the second heat exchanger 220 is movable and matched with the battery body 111 along the first direction and / or the third direction, and the first direction, the second direction and the third direction intersect. In this way, while facilitating the disassembly of the second heat exchanger 220, it can also avoid the interference between the second heat exchanger 220 and the tabs 112 during the assembly and disassembly process, which reduces the assembly and disassembly difficulty of the second heat exchanger 220 on the one hand, and avoids damage to the tabs 112 on the other hand, thereby extending the service life of the tabs 112.

[0119] In some embodiments, in combination Figure 1 , Figure 3 and Fig.14 As shown, the second heat exchange element 220 cooperates with at least one side wall of the battery body 111 to exchange heat. In order to achieve heat exchange between the second heat exchange element 220 and the battery body 111, the temperature of the battery body 111 during operation can be maintained within a suitable temperature range, while ensuring the working performance of the battery cell 110, the service life of the battery cell 110 can be extended, thereby extending the service life of the battery pack 1000.

[0120] In some embodiments, in combination Figure 1 , Figure 3 and Fig.14 As shown, the second heat exchange member 220 extends along the circumference of the battery body 111, so that the second heat exchange member 220 cooperates with at least two side walls of the battery body 111 for heat exchange. The heat exchange area between the second heat exchange member 220 and the battery body 111 is increased, thereby improving the heat exchange efficiency between the second heat exchange member 220 and the battery body 111, thereby achieving the purpose of improving the heat exchange efficiency of the battery cell 110.

[0121] In some embodiments, in combination Fig.11 , Fig.14 and Fig.15 As shown, the second heat exchange member 220 includes two heat exchange plates 221 arranged opposite to each other, the two heat exchange plates 221 are connected to each other through a connecting plate 222, and the two heat exchange plates 221 and the connecting plate 222 cooperate to enclose a heat exchange space 223 for accommodating the battery body 111, and at least part of the battery cells 110 are arranged in the heat exchange space 223. This allows the second heat exchange member 220 to simultaneously exchange heat with at least two side walls of the battery body 111, thereby increasing the heat exchange area between the second heat exchange member 220 and the battery body 111, thereby improving the heat exchange efficiency between the second heat exchange member 220 and the battery body 111.

[0122] At the same time, through the cooperation of the two heat exchange plates 221 and the connecting plate 222, the second heat exchange element 220 and the battery body 111 can also support each other, realize the mutual limitation of the second heat exchange element 220 and the battery body 111, so as to improve the position stability of the battery cell 110 and the second heat exchange element 220.

[0123] In addition, the two heat exchange plates 221 are interconnected through the connecting plate 222, so that the cooling medium entering the second heat exchange element 220 can enter the two heat exchange plates 221 in sequence, so that the two heat exchange plates 221 and the connecting plate 222 can both exchange heat with the battery body 111, thereby improving the working performance of the second heat exchange element 220.

[0124] In some embodiments, a heat-conductive structural adhesive is filled between the second heat exchange element 220 and the battery body 111 to eliminate the gap between the second heat exchange element 220 and the battery body 111, thereby ensuring the heat exchange area between the second heat exchange element 220 and the battery body 111, thereby improving the heat exchange efficiency.

[0125] In addition, the thermally conductive structural adhesive can also limit the displacement of the battery body 111 , further improving the position stability of the battery body 111 .

[0126] In summary, the present application limits the displacement of the pole ear 112 by the first heat exchange component 210 and the limiting component 300, and limits the displacement of the battery body 111 by the second heat exchange component 220 and the thermally conductive structural adhesive, thereby limiting the displacement of the battery cell 110, thereby improving the position stability of the battery cell 110 and ensuring the working performance of the battery cell 110 to a certain extent.

[0127] In some embodiments, in combination Fig.11 , Fig.14 and Fig.15 As shown, the heat exchange space 223 has a second open port 2231 on one side facing the heat exchange plate 221, and the second heat exchange element 220 is movably matched with the battery body 111 through the second open port 2231. Thus, the second heat exchange element 220 and the battery body 111 are detachably matched, so that the second heat exchange element 220 can be removed relative to the battery body 111, which is convenient for repairing or replacing the second heat exchange element 220 without damaging the layout of the battery cell 110, thereby reducing the maintenance difficulty and maintenance cost of the second heat exchange element 220.

[0128] In some embodiments, in combination Fig.11 , Fig.14 and Fig.15 As shown, the two heat exchange plates 221 of the second heat exchange element 220 are arranged opposite to each other in the third direction, the connecting plate 222 connects one end of the heat exchange plate 221 in the first direction, and the other end of the heat exchange plate 221 in the first direction forms a second open port 2231, so that the second heat exchange element 220 can be disassembled along the first direction.

[0129] In summary, in the specific example, the first heat exchanger 210 can be removed relative to the pole ear 112 along the third direction, and the second heat exchanger 220 can be removed relative to the battery body 111 along the first direction. While realizing the detachable cooperation between the heat exchange assembly 200 and the battery cell 110, it can also avoid mutual influence between the first heat exchanger 210 and the second heat exchanger 220 during assembly and disassembly to a certain extent, further reducing the difficulty of disassembly and assembly of the first heat exchanger 210 and the second heat exchanger 220.

[0130] In some embodiments, in combination Fig.11 , Fig.14 and Fig.15 As shown, the second heat exchange element 220 includes a plurality of heat exchange bodies 224, each of which includes two heat exchange plates 221 and a connecting plate 222. The plurality of heat exchange bodies 224 are arranged at intervals along the second direction, and two adjacent heat exchange bodies 224 are connected to each other. The cooperation of the plurality of heat exchange bodies 224 is conducive to reducing the material used for the second heat exchange element 220 while achieving the temperature adjustment of the battery body 111, thereby reducing the use cost of the second heat exchange element 220, and at the same time reducing the weight of the second heat exchange element 220, which is conducive to achieving a lightweight setting of the battery pack 1000 and improving the working performance of the battery pack 1000.

[0131] At the same time, by interconnecting two adjacent heat exchange bodies 224, multiple heat exchange bodies 224 can also be interconnected, so that the cooling medium entering the second heat exchange element 220 can enter multiple heat exchange bodies 224 respectively, thereby improving the heat exchange performance of the second heat exchange element 220, and avoiding the output of heat exchange medium to multiple heat exchange bodies 224 alone, thereby reducing the difficulty of circulating the heat exchange medium.

[0132] The specific number of the plurality of heat exchange bodies 224 can be set according to the size of the battery body 111 and the heat exchange requirements, etc., and this application does not impose any specific restrictions.

[0133] In some embodiments, in combination Fig.12 , Fig.13 and Fig.14As shown, a second storage space is formed in the second heat exchange member 220, and the second heat exchange member 220 has a second inlet 225 and a second outlet 226. The second inlet 225 is used to guide the heat exchange medium into the second storage space, and the second outlet 226 is used to guide the heat exchange medium in the second storage space. The heat exchange medium in the second heat exchange member 220 can flow along the extension direction of the second heat exchange member 220 to achieve heat exchange with the battery body 111, so as to achieve the purpose of adjusting the temperature of the battery body 111. At the same time, the heat exchange medium after heat exchange can be discharged through the second outlet 226 to achieve the circulation of the heat exchange medium in the second heat exchange member 220, improve the heat exchange effect of the heat exchange medium, and then improve the heat exchange effect of the second heat exchange member 220, so that the temperature of the battery body 111 can be effectively maintained within a suitable temperature range.

[0134] At the same time, the above arrangement can also make the first heat exchange element 210 and the second heat exchange element 220 have separate inlets and outlets respectively, so that in the process of adjusting the temperature of the battery cell 110, the first heat exchange element 210 and the second heat exchange element 220 can be opened separately or simultaneously.

[0135] Among them, when the battery cell 110 is charged and discharged at a high rate, the first heat exchange element 210 and the second heat exchange element 220 can be turned on at the same time to improve the heat exchange efficiency. When the battery cell 110 is charged and discharged at a low rate, only the first heat exchange element 210 and the second heat exchange element 220 can be turned on to effectively improve the energy utilization rate of the heat exchange assembly 200.

[0136] In addition, since the pole ear 112 generates more heat, the opening sizes of the first inlet 212 and the first outlet 213 of the second heat exchange element 220 can be appropriately increased to increase the flow rate of the first inlet 212, thereby improving the heat exchange performance of the second heat exchange element 220, realizing zoned thermal management of the battery cell 110, and improving thermal management efficiency.

[0137] In some embodiments, in combination Fig.12 and Fig.13 As shown, the first inlet 212, the first outlet 213, the second inlet 225 and the second outlet 226 are located on the same side of the battery cell 110. In this way, the liquid storage cavity storing the heat exchange medium can be arranged close to the first inlet 212, the first outlet 213, the second inlet 225 and the second outlet 226 at the same time, reducing the circulation difficulty of the heat exchange medium in the first heat exchange element 210 and the second heat exchange element 220.

[0138] Of course, in some other embodiments, the first inlet 212 , the first outlet 213 , the second inlet 225 , and the second outlet 226 may also be disposed on different sides of the battery cell 110 .

[0139] In some embodiments, in combination Fig.14and Fig.15 As shown, a plurality of guide plates 230 are provided in the second heat exchange element 220, and the plurality of guide plates 230 are used to separate a plurality of guide chambers 240 in the second heat exchange element 220, thereby playing a role in diverting the heat exchange medium, which is beneficial to reducing flow resistance, so that the heat exchange medium can effectively circulate in the second heat exchange element 220, and further improve the heat exchange effect of the second heat exchange element 220.

[0140] In some embodiments, the guide plate 230 in the second heat exchange element 220 is made of metal material. Its beneficial effects can be referred to the beneficial effects produced by the guide plate 230 in the first heat exchange element 210 being made of metal material, which will not be repeated here.

[0141] In addition, chamfers may be provided at the corners of the second heat exchange element 220 to reduce the flow resistance of the heat exchange medium in the second heat exchange element 220 , so that the heat exchange medium can circulate effectively in the second heat exchange element 220 , thereby improving the heat exchange effect of the second heat exchange element 220 .

[0142] In some embodiments, the second heat exchange element 220 can be formed by extrusion and then bending. Its beneficial effects can be referred to the beneficial effects produced by the first heat exchange element 210 being formed by extrusion and then bending, and will not be elaborated here.

[0143] Of course, in some other embodiments, the second heat exchange element 220 may also be formed by injection molding.

[0144] In some embodiments, in combination Figure 1 , Fig.11 and Fig.12 As shown, the battery pack 1000 further includes a frame 400, which encloses a receiving cavity, and the battery cell 110 and the heat exchange assembly 200 are both arranged in the receiving cavity. The battery cell 110 and the heat exchange assembly 200 are arranged in the frame 400, so that the frame 400 is convenient for supporting and protecting the battery cell 110 and the heat exchange assembly 200, improving the position stability of the battery cell 110 and the heat exchange assembly 200, and extending the service life of the battery cell 110 and the heat exchange assembly 200 to a certain extent.

[0145] In some embodiments, in combination Figure 1 , Fig.11 and Fig.12 As shown, the frame 400 includes two cover plates 410 arranged opposite to each other in the third direction, and two side beams 420 arranged at intervals in the second direction are provided between the two cover plates 410. The two cover plates 410 and the two side beams 420 cooperate to enclose a receiving cavity to reduce the difficulty of molding the receiving cavity.

[0146] Among them, the two cover plates 410 and the two side beams 420 are the main supporting and protective parts in the battery pack 1000. To facilitate disassembly and assembly, the cover plates 410 and the side beams 420 can be connected by bolts.

[0147] Of course, in some other embodiments, the cover plate 410 and the side beam 420 may also be welded or integrally die-casted.

[0148] Meanwhile, the cover plate 410 and the side beam 420 may be manufactured by die casting or using a mold.

[0149] In a specific example, combined with Figure 1 , Fig.11 and Fig.12 As shown, the battery cell 110 is arranged in the accommodating cavity, and the pole ear 112 of the battery cell 110 is arranged opposite to the side beam 420, the first heat exchange component 210 is arranged between the pole ear 112 and the side beam 420 and is detachably matched with the side beam 420, and the second heat exchange component 220 is arranged between the battery body 111 and the cover plate 410 and is detachably matched with the cover plate 410.

[0150] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3 As shown, a guide member 500 is provided between the frame 400 and the heat exchange assembly 200, and the guide member 500 is used to guide the movement of the heat exchange assembly 200, so as to reduce the difficulty of moving the heat exchange assembly 200, thereby reducing the difficulty of assembling and disassembling the heat exchange assembly 200, and facilitating the disassembly and assembly of the entire heat exchange assembly 200 in the later stage.

[0151] Optionally, the guide member 500 is also used to limit the displacement of the heat exchange assembly 200 in the non-moving direction, so that the heat exchange assembly 200 is stably positioned in the non-moving direction, so that the heat exchange assembly 200 can be stably arranged on the battery cell 110, and the working performance of the heat exchange assembly 200 is guaranteed to a certain extent.

[0152] In summary, the guide member 500 of the present application can not only reduce the difficulty of assembling and disassembling the heat exchange assembly 200, but also limit the heat exchange assembly 200 to improve the position stability of the heat exchange assembly 200, thereby ensuring the working performance of the heat exchange assembly 200 to a certain extent.

[0153] In a specific example, combined with Figure 1 and Figure 2As shown, when the guide member 500 is disposed between the frame 400 and the first heat exchanger 210, the guide member 500 is used to guide the first heat exchanger 210 to move along the third direction and simultaneously limit the displacement of the first heat exchanger 210 in the first direction and the second direction, so as to reduce the difficulty of assembly and disassembly of the first heat exchanger 210, and can also limit the first heat exchanger 210, thereby improving the position stability of the first heat exchanger 210, and thereby ensuring the working performance of the first heat exchanger 210 to a certain extent.

[0154] In a specific example, combined with Figure 1 and Figure 3 As shown, when the guide member 500 is disposed between the frame 400 and the second heat exchange member 220, the guide member 500 is used to guide the second heat exchange member 220 to move along the first direction and simultaneously limit the displacement of the second heat exchange member 220 in the second direction and the third direction, so as to reduce the difficulty of assembling and disassembling the second heat exchange member 220, and can also limit the second heat exchange member 220, thereby improving the position stability of the second heat exchange member 220, and thereby ensuring the working performance of the second heat exchange member 220 to a certain extent.

[0155] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3 As shown, the guide member 500 includes a guide protrusion 510 and a guide groove 520 extending along the moving direction of the heat exchange component 200, the guide protrusion 510 is arranged in one of the frame 400 and the heat exchange component 200, and the guide groove 520 is arranged in the other of the frame 400 and the heat exchange component 200, and the guide protrusion 510 is movably arranged in the guide groove 520. What is meant here is that when the guide protrusion 510 is provided on the frame 400, the guide groove 520 is provided on the heat exchange assembly 200; when the guide protrusion 510 is provided on the heat exchange assembly 200, the guide groove 520 is provided on the frame 400, and the guide protrusion 510 is movably provided in the guide groove 520, so that the guide protrusion 510 and the guide groove 520 can be used to cooperate to guide the movement of the heat exchange assembly 200, thereby guiding the disassembly and assembly of the heat exchange assembly 200, reducing the difficulty of disassembly and assembly of the heat exchange assembly 200, and realizing the repair or replacement of the heat exchange assembly 200 without destroying the layout of the battery cell 110.

[0156] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3As shown, the guide protrusion 510 is provided on the heat exchange component 200, and the guide groove 520 is provided on the frame 400. When the guide protrusion 510 is movably provided in the guide groove 520, the guiding cooperation between the heat exchange component 200 and the frame 400 can be realized, so as to facilitate the movement of the heat exchange component 200 and reduce the difficulty of disassembly and assembly of the heat exchange component 200. At the same time, it is convenient to use the frame 400 to limit the displacement of the heat exchange component 200 in the non-moving direction, thereby improving the position stability of the heat exchange component 200 and ensuring the working performance of the heat exchange component 200 to a certain extent.

[0157] In some embodiments, the guide protrusion 510 is provided on the heat exchange assembly 200 and is formed as an integral part with the heat exchange assembly 200. This improves the connection strength between the guide protrusion 510 and the heat exchange assembly 200, so that the guide protrusion 510 can be stably provided on the heat exchange assembly 200, thereby facilitating the use of the guide member 500 to guide the movement of the heat exchange assembly 200 and limit the displacement of the heat exchange assembly 200 in the non-moving direction, thereby ensuring the working performance of the guide member 500 to a certain extent.

[0158] Optionally, the guide protrusion 510 is welded to the heat exchange assembly 200 to form a whole.

[0159] In some embodiments, the guide protrusion 510 is made of aluminum alloy so that the material of the guide protrusion 510 is consistent with the material of the heat exchange component 200 , thereby facilitating the welding of the guide protrusion 510 and the heat exchange component 200 .

[0160] Of course, in some other embodiments, the guide protrusion 510 and the heat exchange assembly 200 may also be connected by bonding, bolting, or other connection methods.

[0161] In addition, in some other embodiments, the guide protrusion 510 can also be provided on the frame 400, and the guide groove 520 can be provided on the heat exchange component 200. In this way, when the guide protrusion 510 is movably provided in the guide groove 520, the guiding cooperation between the heat exchange component 200 and the frame 400 can also be achieved.

[0162] Among them, when the guide protrusion 510 is arranged on the frame 400, the connection method between the guide protrusion 510 and the frame 400 can refer to the connection method between the guide protrusion 510 and the heat exchange component 200 when the guide protrusion 510 is arranged on the heat exchange component 200, and will not be repeated here.

[0163] It should be noted that, since a guide member 500 is provided between the frame 400 and the heat exchange assembly 200, and both the heat exchange assembly 200 and the guide member 500 are made of aluminum alloy, in order to ensure the same rigidity, the frame 400 may also be made of aluminum alloy.

[0164] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3 As shown, the guide groove 520 is opened toward the frame 400 or the heat exchange assembly 200 to limit the displacement of the heat exchange assembly 200 in the non-moving direction. That is to say, when the guide groove 520 is provided in the frame 400, the guide groove 520 is opened toward the side of the heat exchange assembly 200 to be a constriction; when the guide groove 520 is provided in the heat exchange assembly 200, the guide groove 520 is opened toward the side of the frame 400 to be a constriction. The constriction of the guide groove 520 can facilitate the guide protrusion 510 to be limited in the guide groove 520, so as to facilitate the use of the guide member 500 to limit the displacement of the heat exchange assembly 200 in the non-moving direction, so that the position of the heat exchange assembly 200 in the non-moving direction is stable, so that the heat exchange assembly 200 can be stably arranged on the battery cell 110, and the working performance of the heat exchange assembly 200 is guaranteed to a certain extent.

[0165] In some embodiments, the shape of the guide protrusion 510 is compatible with the shape of the guide groove 520, so that the guide protrusion 510 can be limited and fitted in the guide groove 520, thereby facilitating the use of the guide member 500 to limit the displacement of the heat exchange assembly 200 in the non-moving direction.

[0166] In some embodiments, Figure 2 As shown, the guide protrusion 510 is formed in a “T” shape so as to limit the guide protrusion 510 to fit in the guide groove 520 .

[0167] Of course, in some other embodiments, the shape of the guide protrusion 510 can also be formed into an "I" shape or a trapezoid, etc. No matter what shape it is, it is only necessary to ensure that the guide protrusion 510 can be limited and fitted in the guide groove 520 and the guide member 500 can guide the heat exchange assembly 200 to move.

[0168] It should also be noted that the number of guide members 500 between the frame 400 and the heat exchange assembly 200 can be increased or decreased accordingly according to the size, limiting strength or guiding strength of the battery pack 1000, and this application does not impose any specific restrictions.

[0169] At the same time, when the guide protrusion 510 is provided on the heat exchange component 200 and the guide groove 520 is provided on the frame 400, in order to enhance the assembly strength and prevent an assembly gap between the heat exchange component 200 and the battery cell 110, after the guide protrusion 510 and the guide groove 520 are assembled, the guide protrusion 510 can be fixedly connected to the frame 400 using bolts. When the heat exchange component 200 needs to be disassembled, the bolts connecting the guide protrusion 510 and the frame 400 should be removed first.

[0170] In some embodiments, the frame 400 further surrounds a third opening communicating with the accommodating cavity, and the second heat exchange member 220 is detachably matched with the battery body 111 through the third opening. The second heat exchange member 220 can be repaired or replaced without disassembling the frame 400, further reducing the maintenance difficulty and maintenance cost of the second heat exchange member 220.

[0171] In some embodiments, the third opening is located at one side of the accommodating cavity in the first direction, so that the second heat exchange element 220 is detachable along the first direction.

[0172] In some embodiments, the battery pack 1000 further includes a shell (not shown), which is disposed on the periphery of the frame 400 and is used to protect the frame 400 , the battery cells 110 and the heat exchange assembly 200 to extend the service life of the battery pack 1000 .

[0173] Wherein, when a shell is provided, when disassembling the first heat exchange component 210 and / or the second heat exchange component 220 , the shell may be removed first.

[0174] In a specific example, combined with Figure 1 , Figure 2 and Figure 3 As shown, the guide protrusion 510 on the second heat exchanger 220 can be embedded in the cover plate 410 and the second heat exchanger 220 can move forward and backward along the first direction, and the guide protrusion 510 on the first heat exchanger 210 can be embedded in the side beam 420 and the first heat exchanger 210 can move up and down along the third direction. In this way, not only can the space utilization of the heat exchange assembly 200 be improved, but also the first heat exchanger 210 and the second heat exchanger 220 of the heat exchange assembly 200 can be repaired or replaced without damaging the structure of the battery pack 1000.

[0175] Specifically, when it is necessary to remove the second heat exchanger 220, first disassemble the outer shell, and then move the second heat exchanger 220 along the first direction to remove the second heat exchanger 220 without disassembling the frame 400 and the battery cell 110; when it is necessary to remove the first heat exchanger 210, first disassemble the outer shell, then remove the second heat exchanger 220, and finally move the first heat exchanger 210 along the third direction to remove the first heat exchanger 210, and there is no need to disassemble the frame 400 and the battery cell 110, thereby realizing the repair or replacement of the first heat exchanger 210 and the second heat exchanger 220 of the heat exchange assembly 200 without damaging the structure of the battery pack 1000.

[0176] It should also be noted that, combined with Fig.11 , Fig.12 and Fig.13As shown, since the second inlet 225 and the second outlet 226 of the second heat exchanger 220 are both arranged on one side of the second heat exchanger 220 in the first direction, in order to avoid the second inlet 225 and the second outlet 226 hindering the movement of the second heat exchanger 220, the outer diameters of the second inlet 225 and the second outlet 226 are set to not exceed the thickness of the second heat exchanger 220.

[0177] When the thickness of the second heat exchange element 220 is adjusted, the outer diameters of the second inlet 225 and the second outlet 226 can be adaptively adjusted as long as the outer diameters of the second inlet 225 and the second outlet 226 do not exceed the thickness of the second heat exchange element 220 .

[0178] In some embodiments, in combination Figure 1 , Figure 5 and Fig.11 As shown, the battery pack 1000 includes a plurality of battery cell groups 100, which are arranged along the second direction, and each battery cell group 100 has a plurality of battery cells 110 arranged along the first direction, and the first direction intersects the second direction. This is to achieve reasonable utilization of the space in the battery pack 1000, ensure that a large number of battery cells 110 can be arranged in the battery pack 1000, increase the capacity of the battery pack 1000, and further improve the working performance of the battery pack 1000.

[0179] It is worth noting that the present application arranges the multiple battery cells 110 in each battery cell group 100 to be arranged along a first direction so that the arrangement of the multiple battery cells 110 is consistent with the disassembly direction of the second heat exchange component 220. In this way, the heat exchange plate 221 of the second heat exchange component 220 can cover the multiple battery cells 110 at the same time to exchange heat with the multiple battery cells 110, thereby reducing the difficulty of heat exchange of the multiple battery cells 110.

[0180] That is to say, the present application not only makes the second heat exchange element 220 detachable by configuring the second heat exchange element 220 to be detachable along the first direction, but also enables the second heat exchange element 220 to simultaneously exchange heat with multiple battery cells 110 .

[0181] In addition, when a plurality of battery cells 110 are arranged along the first direction, Figure 1 , Figure 2 and Fig. 9 As shown, in the first direction, the first heat exchange element 210 located between two adjacent heat exchange chambers 211 contacts the side surface of the battery body 111 , further improving the heat exchange performance of the first heat exchange element 210 .

[0182] In some embodiments, in combination Figure 1 , Figure 5 and Fig.11As shown, the frame 400 also includes a longitudinal beam 430, which is arranged between two adjacent battery cell groups 100 to separate the two adjacent battery cell groups 100. On the one hand, it avoids short circuit between the two adjacent battery cell groups 100 and improves the safety of the battery cell groups 100. On the other hand, the longitudinal beam 430 can also be used to fix the battery cell groups 100 to improve the position stability of the battery cell groups 100.

[0183] In some embodiments, the longitudinal beam 430 is connected to the cover plate 410. The connection method between the longitudinal beam 430 and the cover plate 410 can refer to the connection method between the cover plate 410 and the side beam 420 mentioned above, which will not be repeated here.

[0184] Meanwhile, the side beam 420 may be manufactured by die casting or using a mold.

[0185] In a specific example, combined with Figure 1 , Figure 5 and Fig.11 As shown, the battery pack 1000 includes two groups of battery cell groups 100, each group of battery cell groups 100 has fifty battery cells 110, the battery cells 110 in the same group of battery cell groups 100 are connected in series, the two groups of battery cell groups 100 are connected in parallel, and the longitudinal beam 430 and the two adjacent side beams 420 are equidistantly distributed to effectively balance the pressure of each component in the frame 400 and extend the service life of the frame 400.

[0186] Optionally, combined Figure 1 and Figure 8 As shown, the first heat exchanger 210 includes a plurality of first heat exchangers 210, and the plurality of first heat exchangers 210 correspond to the plurality of battery cell groups 100 one by one, and the first heat exchangers 210 are arranged around the periphery of the battery cell groups 100. The plurality of battery cell groups 100 can all be temperature-regulated by the first heat exchanger 210, so that the temperature of the plurality of battery cells 110 in the plurality of battery cell groups 100 can be maintained within a suitable temperature range, thereby improving the working performance of the battery cell groups 100.

[0187] In some embodiments, in combination Figure 8 and Fig. 9 As shown, two adjacent first heat exchange elements 210 are interconnected, so that the heat exchange medium can flow between the multiple first heat exchange elements 210, improve the heat exchange performance of the first heat exchange elements 210, avoid outputting the heat exchange medium to the multiple first heat exchange elements 210 alone, and reduce the difficulty of circulating the heat exchange medium.

[0188] In summary, the heat exchange assembly 200 of the battery pack 1000 of the present application includes a first heat exchanger 210 for dissipating heat from the pole ear 112 and a second heat exchanger 220 for dissipating heat from the battery body 111. The first heat exchanger 210 includes a first inlet 212, a first outlet 213 and a guide plate 230. The first heat exchanger 210 is also provided with a guide protrusion 510. The second heat exchanger 220 includes a second inlet 225, a second outlet 226 and a guide plate 230. The second heat exchanger 220 is also provided with a guide protrusion 510. The second heat exchanger 220 is embedded between the two cover plates 410 through the guide protrusion 510, thereby achieving connection with the two cover plates 410. The first heat exchanger 210 is embedded in the side beam 420 and the longitudinal beam 430 through the guide protrusion 510, thereby achieving connection with the side beam 420 and the longitudinal beam 430.

[0189] It should be noted that in order to make the guide protrusion 510 completely embedded in the frame 400, the extension length of the guide protrusion 510 embedded in the cover plate 410 along the first direction is consistent with the width of the cover plate 410 in the first direction, and the height of the guide protrusion 510 embedded in the side beam 420 and the longitudinal beam 430 in the second direction is consistent with the height of the side beam 420 and the longitudinal beam 430 in the second direction; at the same time, the specific size of the guide protrusion 510 must be consistent with the size of the guide groove 520, so that the first heat exchange member 210 and the second heat exchange member 220 not only play the role of fixing the battery cell 110 but also play the role of supporting the entire battery pack 1000, thereby improving the structural stability of the battery pack 1000.

[0190] In a specific example, the second heat exchanger 220 is mainly responsible for thermal management of the upper and lower surfaces of the battery cell 110 in the first direction, and the first heat exchanger 210 is mainly responsible for thermal management of each side surface and the tab 112 of the battery cell 110 in the second direction.

[0191] In summary, the thermal management system of the battery pack 1000 of the present application adopts a first heat exchange member 210 and a second heat exchange member 220 with a guide protrusion 510. The first heat exchange member 210 and the second heat exchange member 220 perform zoned thermal management on the battery cell 110, which can effectively ensure that the temperature difference between any two points of the battery cell 110 is within a reasonable range, and the first heat exchange member 210 and the second heat exchange member 220 can be repaired and replaced without damaging the structure of the battery pack 1000, and the first heat exchange member 210 and the second heat exchange member 220 can be opened separately, which effectively improves the space utilization and energy utilization of the thermal management system. In addition, the first heat exchange member 210 and the second heat exchange member 220 can also play a role in strengthening the internal support of the battery pack 1000.

[0192] The following describes an electric device according to an embodiment of the present invention.

[0193] An electric device according to an embodiment of the present invention includes: a battery pack 1000 .

[0194] The battery pack 1000 is the aforementioned battery pack 1000 , and the specific structure of the battery pack 1000 is not described in detail herein.

[0195] It can be seen from the above structure that the electrical equipment of the embodiment of the present invention can use the battery pack 1000 to power the electrical equipment, so as to ensure the working performance of the electrical equipment to a certain extent and reduce the maintenance difficulty of the electrical equipment to a certain extent.

[0196] It should be noted that the electrical equipment of the present application may be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, electric vehicles, vehicles, ships, spacecraft, etc.

[0197] In a specific example, the electrical device is a vehicle, and the battery pack 1000 can be used as an operating power source for the vehicle or as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0198] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0199] Figure 1 , Figure 5 and Fig.11 Two groups of battery cell groups 100 are shown for illustrative purposes, but after reading the above technical solution, ordinary technicians can obviously understand that the solution can be applied to three or more groups of battery cell groups 100, which also falls within the scope of protection of the present invention.

[0200] Other structures of the battery pack 1000 and the electric device having the same according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0201] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0202] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A battery cell (110), wherein the battery cell (110) comprises a battery body (111) and a tab (112) connected to the battery body (111); A heat exchange component (200) is detachably arranged on the battery cell (110), and the heat exchange component (200) respectively exchanges heat with the battery body (111) and the tab (112).

2. The battery pack according to claim 1, characterized in that: The heat exchange component (200) comprises a first heat exchange element (210) and a second heat exchange element (220); the first heat exchange element (210) is movably disposed on the electrode tab (112); and the second heat exchange element (220) is movably disposed on the battery body (111).

3. The battery pack according to claim 2, characterized in that: At least part of the first heat exchange element (210) is arranged on two opposite sides of the pole lug (112) in a first direction to limit the displacement of the pole lug (112) in the first direction; The first heat exchange element (210) is movably matched with the pole ear (112) along a second direction and / or a third direction, and the first direction, the second direction and the third direction intersect.

4. The battery pack according to claim 3, characterized in that: A limiting member (300) is provided between the pole lug (112) and the first heat exchange member (210), and the limiting member (300) cooperates with the pole lug (112) to limit the displacement of the pole lug (112) in the first direction.

5. The battery pack according to claim 4, characterized in that: The limiting member (300) is a heat-conducting insulating member.

6. The battery pack according to claim 3, characterized in that: At least a portion of the first heat exchange element (210) protrudes in a direction away from the pole ear (112) to form a heat exchange cavity (211) facing the pole ear (112); the heat exchange cavity (211) opens toward one side of the pole ear (112); and the pole ear (112) is arranged in the heat exchange cavity (211) through the opening.

7. The battery pack according to claim 6, characterized in that: The battery body (111) is provided with the pole ears (112) at both opposite ends in the second direction, and the first heat exchange component (210) is provided with a plurality of the heat exchange cavities (211) corresponding one-to-one to the pole ears (112).

8. The battery pack according to claim 6, characterized in that: The pole lug (112) extends along the third direction, and the heat exchange cavity (211) is provided with a first open opening (2111) at at least one end in the third direction, and the first heat exchange element (210) is movably matched with the pole lug (112) through the first open opening (2111).

9. The battery pack according to claim 8, characterized in that: In the third direction, the extension length of the heat exchange cavity (211) is smaller than the extension length of the electrode tab (112).

10. The battery pack according to claim 2, characterized in that: The pole ears (112) are arranged at two opposite ends of the battery body (111) in the second direction, and the second heat exchange element (220) is movably matched with the battery body (111) along the first direction and / or the third direction, and the first direction, the second direction and the third direction intersect.

11. The battery pack according to claim 10, characterized in that: The second heat exchange element (220) cooperates with at least one side wall of the battery body (111) for heat exchange.

12. The battery pack according to claim 11, characterized in that: The second heat exchange component (220) comprises two heat exchange plates (221) arranged opposite to each other, the two heat exchange plates (221) are connected to each other via a connecting plate (222), the two heat exchange plates (221) and the connecting plate (222) cooperate to enclose a heat exchange space (223) for accommodating the battery body (111), and at least part of the battery cell (110) is arranged in the heat exchange space (223).

13. The battery pack according to claim 12, characterized in that: The heat exchange space (223) has a second open opening (2231) on a side facing the heat exchange plate (221), and the second heat exchange element (220) is movably matched with the battery body (111) through the second open opening (2231).

14. The battery pack according to claim 13, characterized in that: The second heat exchange element (220) comprises a plurality of heat exchange bodies (224), each of the heat exchange bodies (224) comprises two heat exchange plates (221) and the connecting plate (222), the plurality of heat exchange bodies (224) are arranged at intervals along the second direction, and two adjacent heat exchange bodies (224) are connected to each other.

15. The battery pack according to claim 2, characterized in that: The heat exchange component (200) is formed as a heat exchange plate, the interior of the heat exchange plate is hollow, and a plurality of flow guide plates (230) arranged at intervals are provided in the heat exchange plate to separate a plurality of flow guide cavities (240) extending along the flow guide direction thereof in the heat exchange component (200).

16. The battery pack according to claim 2, characterized in that: A first accommodating space is formed in the first heat exchange member (210), and the first heat exchange member (210) has a first inlet (212) and a first outlet (213), the first inlet (212) and the first outlet (213) being connected to opposite ends of the first accommodating space, the first inlet (212) being used to guide the heat exchange medium into the first accommodating space, and the first outlet (213) being used to guide the heat exchange medium in the first accommodating space out; A second accommodating space is formed in the second heat exchange member (220), and the second heat exchange member (220) has a second inlet (225) and a second outlet (226). The second inlet (225) is used to guide the heat exchange medium into the second accommodating space, and the second outlet (226) is used to guide the heat exchange medium in the second accommodating space.

17. The battery pack according to claim 16, characterized in that: The first inlet (212), the first outlet (213), the second inlet (225), and the second outlet (226) are located on the same side of the battery cell (110).

18. The battery pack according to any one of claims 2 to 17, characterized in that: The battery pack further comprises a frame (400), wherein the frame (400) encloses a receiving cavity, and the battery cell (110) and the heat exchange assembly (200) are both arranged in the receiving cavity.

19. The battery pack according to claim 18, characterized in that: A guide member (500) is provided between the frame (400) and the heat exchange assembly (200), and the guide member (500) is used to guide the movement of the heat exchange assembly (200); The guide member (500) is also used to limit the displacement of the heat exchange component (200) in the non-moving direction.

20. The battery pack according to claim 19, characterized in that: The guide member (500) comprises a guide protrusion (510) and a guide groove (520) extending along the moving direction of the heat exchange component (200); the guide protrusion (510) is provided on one of the frame (400) and the heat exchange component (200); the guide groove (520) is provided on the other of the frame (400) and the heat exchange component (200); and the guide protrusion (510) is movably provided in the guide groove (520).

21. The battery pack according to claim 20, characterized in that: The guide protrusion (510) is provided on the heat exchange component (200) and is formed as an integral part with the heat exchange component (200).

22. The battery pack according to claim 20, characterized in that: The opening of the guide groove (520) on one side facing the frame (400) or the heat exchange component (200) is a constricted opening, so as to limit the displacement of the heat exchange component (200) in the non-moving direction.

23. The battery pack according to claim 18, characterized in that: The frame (400) is further provided with a third opening communicating with the accommodating cavity, and the second heat exchange element (220) is detachably matched with the battery body (111) through the third opening.

24. The battery pack according to claim 18, characterized in that: The battery pack comprises a plurality of battery cell groups (100), wherein the plurality of battery cell groups (100) are arranged along a second direction, and each of the battery cell groups (100) has a plurality of battery cells (110) arranged along a first direction, wherein the first direction intersects with the second direction; The first heat exchange component (210) includes a plurality of first heat exchange components (210), the plurality of first heat exchange components (210) correspond one-to-one to the plurality of battery cell groups (100), and the first heat exchange component (210) is arranged around the periphery of the battery cell group (100).

25. The battery pack according to claim 24, characterized in that: Two adjacent first heat exchange components (210) are connected to each other.

26. An electrical equipment, characterized in that: Comprising a battery pack according to any one of claims 1-25.

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