Battery pack and electric device with same

Abstract

This invention discloses a battery pack and an electrical device having the same. The battery pack includes individual battery cells and a heat exchange assembly. Each battery cell has a battery body and a tab connected to the battery body. The heat exchange assembly is detachably disposed on the battery cell and exchanges heat with the battery body and the tab. The battery pack of this invention not only adjusts the temperature of the individual battery cells but also improves temperature regulation efficiency and facilitates the maintenance and replacement of the heat exchange assembly, reducing the difficulty and cost of maintaining the heat exchange assembly.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack and an electrical device having the same. Background Technology

[0002] A battery pack typically consists of multiple battery cells. Since each battery cell generates heat during operation, heat exchangers are usually installed to exchange heat with the battery cells in order to reduce the impact of heat on the battery cells. This allows the temperature of the battery cells to be maintained within a suitable range during operation, thereby improving the safety of the battery cells and extending their service life.

[0003] However, when existing heat exchangers dissipate heat from battery cells, they not only have low heat dissipation efficiency, but may also cause large temperature gradients inside the battery cells, which in turn leads to inconsistent degradation rates in different parts of the battery cells, seriously affecting the service life of the battery cells. In addition, existing heat exchangers are difficult to repair and replace. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that, while avoiding large temperature gradients within individual battery cells, also facilitates the maintenance and replacement of heat exchange components, reducing the maintenance difficulty and cost of the heat exchange components, and solving the technical problems of low heat dissipation efficiency and high maintenance and replacement difficulty of heat exchange components in the prior art.

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

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

[0007] According to the battery pack of the present invention, by detachably disassembling the heat exchange components to the battery cells, the heat exchange components can be removed relative to the battery cells, thereby enabling maintenance and replacement of the heat exchange components without damaging the battery pack structure, reducing the maintenance difficulty of the heat exchange components. Simultaneously, by configuring the heat exchange components to exchange heat with the battery body and the electrode tabs respectively, zoned thermal management of the battery cells is achieved, improving the heat exchange efficiency of the battery cells and ensuring that the temperature difference between different areas of the battery cells is within a reasonable range to a certain extent. This avoids large temperature gradients within the battery cells, extending the service life of the battery cells and improving their safety. In other words, the battery pack of this application not only improves the heat exchange efficiency of the battery cells but also avoids large temperature gradients within the battery cells to a certain extent, while reducing the difficulty of maintenance and replacement of the heat exchange components.

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

[0009] In some embodiments, at least a portion of the first heat exchanger is disposed on opposite sides of the tab in a first direction to limit the displacement of the tab in the first direction; the first heat exchanger is movably engaged with the tab along a second direction and / or a third direction, the first direction, the second direction and the third direction intersecting.

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

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

[0012] In some embodiments, at least a portion of the first heat exchanger protrudes away from the tab to form a heat exchange cavity facing the tab, the heat exchange cavity opening on one side facing the tab, and the tab being disposed within the heat exchange cavity through the opening.

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

[0014] In some embodiments, the tab extends along the third direction, and the heat exchange cavity has a first opening at at least one end in the third direction, and the first heat exchange member is movably engaged with the tab through the first opening.

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

[0016] In some embodiments, the tabs are located at opposite ends of the battery body in a second direction, and the second heat exchanger is movably engaged with the battery body along a first direction and / or a third direction, wherein the first direction, the second direction, and the third direction intersect.

[0017] In some embodiments, the second heat exchanger is in heat exchange cooperation with at least one sidewall of the battery body.

[0018] In some embodiments, the second heat exchanger includes two heat exchange plates disposed opposite to each other, the two heat exchange plates being interconnected by a connecting plate, the two heat exchange plates and the connecting plate cooperating to enclose a heat exchange space for accommodating the battery body, and at least a portion of the battery cells being disposed within the heat exchange space.

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

[0020] In some embodiments, the second heat exchanger includes a plurality of heat exchange bodies, each heat exchange body including two heat exchange plates and a connecting plate, the plurality of heat exchange bodies being arranged at intervals along the second direction, and adjacent heat exchange bodies being interconnected.

[0021] In some embodiments, the heat exchange assembly is formed as a heat exchange plate, the heat exchange plate is hollow inside, and the heat exchange plate is provided with a plurality of spaced-apart guide plates to separate a plurality of guide cavities extending along its guide direction within the heat exchange assembly.

[0022] In some embodiments, a first receiving space is formed within the first heat exchanger, the first heat exchanger having a first inlet and a first outlet, the first inlet and the first outlet communicating with opposite ends of the first receiving space, the first inlet being used to guide the heat exchange medium into the first receiving space, and the first outlet being used to discharge the heat exchange medium from the first receiving space; a second receiving space is formed within the second heat exchanger, the second heat exchanger having a second inlet and a second outlet, the second inlet being used to guide the heat exchange medium into the second receiving space, and the second outlet being used to discharge the heat exchange medium from the second receiving 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 that encloses a receiving cavity, in which the individual battery cells and the heat exchange assembly are disposed.

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

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

[0027] In some embodiments, the guide protrusion is provided on the heat exchange assembly and is integrally formed with the heat exchange assembly.

[0028] In some embodiments, the opening of the guide groove toward the frame or the heat exchange assembly is narrowed to limit the displacement of the heat exchange assembly in the non-moving direction.

[0029] In some embodiments, the frame further encloses a third opening that communicates with the receiving cavity, and the second heat exchanger is detachably engaged with the battery body through the third opening.

[0030] In some embodiments, the battery pack includes multiple sets of battery cell groups arranged along a second direction, each set of battery cell groups having multiple battery cells arranged along a first direction, the first direction intersecting the second direction; the first heat exchanger includes multiple first heat exchangers, each corresponding to one of the multiple sets of battery cell groups, the first heat exchangers surrounding the outer periphery of the battery cell groups.

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

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

[0033] According to the embodiments of the present invention, the electrical equipment can be powered by the aforementioned battery pack, thereby ensuring the working performance of the electrical equipment to a certain extent and reducing the maintenance difficulty of the electrical equipment to a certain extent.

[0034] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

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

[0036] Figure 1 This is an exploded view of a battery pack according to some embodiments of the present invention.

[0037] Figure 2 for Figure 1 A magnified view of a portion of region I in the middle.

[0038] Figure 3 for Figure 1 A magnified view of a portion of region II.

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

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

[0041] Figure 6 for Figure 5 A magnified view of a portion of region III.

[0042] Figure 7 for Figure 5 A magnified view of a portion of region IV in the middle.

[0043] Figure 8 This is a schematic diagram of the first heat exchanger according to some embodiments of the present invention.

[0044] Figure 9 for Figure 8 A magnified view of a portion of region V in the middle.

[0045] Figure 10 for Figure 8 A cross-sectional view along line AA.

[0046] Figure 11 for Figure 1 A 3D diagram of the battery pack without the cover plate.

[0047] Figure 12 for Figure 1 A 3D schematic diagram of the battery pack.

[0048] Figure 13 for Figure 12 A magnified view of a portion of the central region VI.

[0049] Figure 14 This is a schematic diagram of a second heat exchanger according to some embodiments of the present invention.

[0050] Figure 15 for Figure 14 A sectional view along line BB.

[0051] Figure label:

[0052] 1000, battery pack;

[0053] 100. Battery cell packs;

[0054] 110. Battery cell; 111. Battery body; 112. Electrode tab;

[0055] 200. Heat exchange components;

[0056] 210. First heat exchanger;

[0057] 211. Heat exchange chamber; 2111. First opening;

[0058] 212. First import;

[0059] 213. First Exit;

[0060] 220. Second heat exchanger;

[0061] 221. Heat exchange plate;

[0062] 222. Connecting plate;

[0063] 223. Heat exchange space; 2231. Second opening;

[0064] 224. Heat exchanger body;

[0065] 225. Second import;

[0066] 226. Second Exit;

[0067] 230. Deflector plate;

[0068] 240. Flow guiding cavity;

[0069] 300. Limiting components;

[0070] 400. Frame; 410. Cover plate; 420. Side beam; 430. Longitudinal beam;

[0071] 500, guide component; 510, guide protrusion; 520, guide groove. Detailed Implementation

[0072] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] Currently, liquid cooling or air cooling is commonly used to remove heat from battery cells. However, since the battery cell is a composite structure consisting of three layers of components—positive electrode, separator, and negative electrode—that are stacked in a cycle, and the separator has poor thermal conductivity, the above heat dissipation methods result in the thermal conductivity of the battery cell in the direction perpendicular to the electrode being significantly lower than that in the direction parallel to the electrode, affecting heat dissipation efficiency. It may also generate a large temperature gradient inside the battery cell, leading to inconsistent degradation rates in different parts of the battery cell and seriously affecting the lifespan of the battery cell.

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

[0076] Therefore, zoned thermal management, which combines electrode 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, the existing heat exchange components are difficult to adjust once assembled. If the pipes of the heat exchange components are damaged, the battery cell group needs to be disassembled to inspect the pipes. It is not possible to repair or replace a single pipe without damaging the layout of the battery cell group, which increases the difficulty and cost of maintaining the heat exchange components.

[0078] To solve the above problems, such as Figure 1 As shown, this application proposes a battery pack 1000, which can perform zoned thermal management of the battery body 111 and the tab 112 of the battery cell 110, and can also repair or replace the heat exchange component 200 without damaging the layout of the battery cell group 100, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange component 200.

[0079] The battery pack 1000 of the present invention is 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 allow electrical devices to be electrically connected to the battery cell 110 through the tab 112, thereby facilitating the use of the battery cell 110 to supply power to the electrical devices and ensuring the working performance of the battery cell 110 to a certain extent.

[0082] The heat exchange assembly 200 is detachably mounted on the battery cell 110, and exchanges heat with the battery body 111 and the electrode tab 112 respectively. This allows the heat exchange assembly 200 to regulate the temperature of the battery body 111 and the electrode tab 112 separately, achieving the purpose of zoned thermal management of the battery cell 110. This not only improves the heat exchange efficiency of the battery cell 110, but also avoids large temperature gradients inside the battery cell 110 to a certain extent, thus extending the service life of the battery cell 110.

[0083] It should be noted that 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 raise or lower 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 the preset temperature, the heat exchange component 200 can be used to raise the temperature of the battery body 111 and the tab 112, thereby 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 component 200 can be used to lower the temperature of the battery body 111 and the tab 112, thereby lowering the temperature of the battery cell 110. This allows the temperature of the battery cell 110 during operation to be maintained within a suitable temperature range, ensuring the performance of the battery cell 110 while extending its service life, and thus extending the service life of the battery pack 1000.

[0085] Meanwhile, by detachably mounting the heat exchange component 200 onto the battery cell 110, the heat exchange component 200 can be disassembled relative to the battery cell 110, thereby enabling the heat exchange component 200 to be repaired or replaced without damaging the layout of the battery cell 110, thus reducing the maintenance difficulty and cost of the heat exchange component 200.

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

[0087] Meanwhile, by setting the heat exchange component 200 to exchange heat with the battery body 111 and the tab 112 respectively, the purpose of using the heat exchange component 200 to perform zoned thermal management of the battery cell 110 can be achieved. This not only regulates the temperature of the battery cell 110, but also improves the heat exchange efficiency of the battery cell 110, and to a certain extent avoids the generation of a large temperature gradient inside the battery cell 110, further extending the service life of the battery cell 110.

[0088] In addition, the heat exchange component 200 is detachably disposed on the battery cell 110 to achieve detachable engagement between the heat exchange component 200 and the battery cell 110, thereby enabling the heat exchange component 200 to be disassembled relative to the battery cell 110. This allows the heat exchange component 200 to be repaired or replaced without damaging the layout of the battery cell 110, reducing the maintenance difficulty and cost of the heat exchange component 200.

[0089] It is understandable that, compared with the prior art, the battery pack 1000 of this 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 maintenance and replacement of the heat exchange component 200, thereby reducing the maintenance difficulty and maintenance cost of the heat exchange component 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 realize heat exchange between the heat exchange component 200 and the battery body 111 and the tab 112. This facilitates the use of the heat exchange component 200 to regulate 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, thus extending the service life of the battery cell 110.

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

[0092] In some embodiments, combined with Figure 1, Figure 4 and Figure 5 As shown, the heat exchange assembly 200 includes a first heat exchange element 210 and a second heat exchange element 220. The first heat exchange element 210 is movably disposed on the tab 112, and the second heat exchange element 220 is movably disposed on the battery body 111. This allows the heat exchange assembly 200 to be movably disposed on the battery cell 110, facilitating disassembly of the heat exchange assembly 200 relative to the battery cell 110. This enables maintenance or replacement of the heat exchange assembly 200 without damaging the layout of the battery cell 110, reducing the maintenance difficulty and cost of the heat exchange assembly 200.

[0093] Meanwhile, by movably disposing the first heat exchanger 210 on the tab 112 and movably disposing the second heat exchanger 220 on the battery body 111, the heat exchange assembly 200 can exchange heat with the battery body 111 and the tab 112 respectively, thereby achieving the purpose of zoned thermal management of the battery cell 110, thereby improving the heat exchange efficiency of the battery cell 110, and to a certain extent avoiding the generation of a large temperature gradient inside the battery cell 110, thus 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 element 210 and a second heat exchange element 220, the difficulty of matching the heat exchange assembly 200 with the battery cell 110 can be reduced, so as to ensure the working performance of the heat exchange assembly 200 to a certain extent.

[0095] In some embodiments, combined with Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, at least a portion of the first heat exchange element 210 is disposed on opposite sides of the tab 112 in the first direction to limit the displacement of the tab 112 in the first direction. Here, the first direction can be understood as... Figure 1 and Figure 5 As shown in the Y direction, at least part of the first heat exchanger 210 is disposed on opposite sides of the tab 112 in the Y direction, so that the first heat exchanger 210 can not only exchange heat with the tab 112, but also restrict the displacement of the tab 112 in the Y direction, thereby fixing the tab 112 and improving the positional stability of the tab 112, thereby improving the positional 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 exchanger 210 is movably engaged with the tab 112 along a second direction and / or a third direction, wherein the first direction, the second direction, and the third direction intersect. Here, the second direction can be understood as... Figure 1 and Figure 5 The X direction shown can be understood as the third direction. Figure 1 As shown in the Z direction, the first heat exchanger 210 can be movably engaged with the tab 112 along the X direction, along the Z direction, or simultaneously along both the X and Z directions. This makes the direction in which the first heat exchanger 210 restricts the displacement of the tab 112 intersect with the direction of movement of the first heat exchanger 210. In this way, while using the first heat exchanger 210 to restrict the displacement of the tab 112, it is also convenient to disassemble the first heat exchanger 210 relative to the tab 112, reducing the maintenance difficulty and maintenance cost of the first heat exchanger 210.

[0097] In the description of this invention, features defined as "first," "second," and "third" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0098] In some embodiments, combined with Figure 5 , Figure 6 and Figure 7 As shown, a limiting member 300 is provided between the tab 112 and the first heat exchanger 210. The limiting member 300 cooperates with the tab 112 to limit the displacement of the tab 112 in the first direction. This further limits the displacement of the tab 112 in the first direction, improves the limiting strength, and thus improves the positional stability of the tab 112, ensuring the working performance of the tab 112 to a certain extent.

[0099] In some embodiments, the limiting member 300 is a thermally conductive and insulating member. This can prevent the limiting member 300 from affecting the heat exchange efficiency between the tab 112 and the first heat exchanger 210, thereby achieving the purpose of adjusting the temperature of the tab 112 using the first heat exchanger 210. On the other hand, it can also prevent the tab 112 from forming an electrical connection with the limiting member 300 and / or the first heat exchanger 210, preventing the battery cell 110 from short-circuiting and ensuring the working performance and safety of the battery cell 110 to a certain extent.

[0100] In other words, the limiting member 300 of this application can not only further improve the positional stability of the electrode 112, but also prevent the electrode 112 from forming an electrical connection with the limiting member 300 and / or the first heat exchange member 210.

[0101] In some embodiments, the limiting member 300 may be supported by materials such as silicone or rubber, so that the limiting member 300 has good thermal conductivity and insulation, thereby making the limiting member 300 a thermally conductive and insulating member, ensuring that the heat at the tab 112 can be effectively conducted to the first heat exchanger 210 and preventing the battery cell 110 from short-circuiting.

[0102] In some embodiments, combined with Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, at least a portion of the first heat exchange element 210 protrudes away from the tab 112 to form a heat exchange cavity 211 facing the tab 112. The heat exchange cavity 211 opens on one side facing the tab 112, and the tab 112 is disposed within the heat exchange cavity 211 through the opening. This arrangement allows at least a portion of the first heat exchange element 210 to be disposed on opposite sides of the tab 112 in the first direction, thereby achieving heat exchange between the first heat exchange element 210 and the tab 112. Furthermore, the first heat exchange element 210 can be used to restrict the displacement of the tab 112 in the first direction, improving the positional stability of the tab 112.

[0103] Meanwhile, by setting up a heat exchange cavity 211 with an opening, the difficulty of fitting the first heat exchange element 210 and the tab 112 can be reduced, and the contact area between the first heat exchange element 210 and the tab 112 can be increased, thereby improving the heat exchange efficiency between the first heat exchange element 210 and the tab 112.

[0104] In some embodiments, combined with Figure 5 , Figure 6 and Figure 7 As shown, the battery body 111 has tabs 112 at both opposite ends in the second direction, and the first heat exchanger 210 has multiple heat exchange chambers 211 corresponding one-to-one with the tabs 112. This means that when the battery body 111 has tabs 112 at both opposite ends in the second direction, the first heat exchanger 210 has multiple heat exchange chambers 211, each corresponding one-to-one with a tab 112. This allows one first heat exchanger 210 to simultaneously exchange heat with multiple tabs 112, improving the heat exchange efficiency of the battery cell 110 while simplifying the number of first heat exchangers 210 and reducing the difficulty of assembling and disassembling them.

[0105] In some embodiments, combined with Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, the tab 112 extends along a third direction, and the heat exchange chamber 211 has a first opening 2111 at at least one end in the third direction. The first heat exchange element 210 is movably engaged with the tab 112 through the first opening 2111. This enables a detachable engagement between the first heat exchange element 210 and the tab 112, allowing the first heat exchange element 210 to be removed relative to the tab 112 along the third direction. This facilitates the repair or replacement of the first heat exchange element 210 without damaging the layout of the battery cell 110, reducing the maintenance difficulty and cost of the first heat exchange element 210.

[0106] In some embodiments, the heat exchange chamber 211 is provided with a first opening 2111 at opposite ends in the third direction to further reduce the difficulty of disassembling the first heat exchanger 210 relative to the tab 112.

[0107] In some embodiments, combined with Figure 8 and Figure 9 As shown, a first receiving space is formed within the first heat exchanger 210. The first heat exchanger 210 has a first inlet 212 and a first outlet 213, which connect to opposite ends of the first receiving space. The first inlet 212 is used to guide the heat exchange medium into the first receiving space, and the first outlet 213 is used to discharge the heat exchange medium from the first receiving space. In this way, the heat exchange medium located within the first heat exchanger 210 can flow along the extension direction of the first heat exchanger 210 to achieve heat exchange with the tab 112, thereby regulating the temperature of the tab 112. At the same time, the heat exchange medium after heat exchange can be discharged through the first outlet 213, so as to realize the circulation of the heat exchange medium within the first heat exchanger 210, improve the heat exchange effect of the heat exchange medium, and thus improve the heat exchange effect of the first heat exchanger 210, so that the temperature of the tab 112 can be effectively maintained within a suitable temperature range.

[0108] In some embodiments, combined with Figure 8 , Figure 10 , Figure 14 and Figure 15 As shown, the heat exchange assembly 200 is formed as a heat exchange plate, which is hollow inside. Multiple spaced guide plates 230 are provided inside the heat exchange plate to divide the heat exchange assembly 200 into multiple guide cavities 240 extending along their guiding direction. This serves to divert the heat exchange medium, which helps reduce flow resistance and allows the heat exchange medium to circulate effectively within the heat exchange assembly 200, further improving the heat exchange effect of the heat exchange assembly 200.

[0109] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0110] In specific examples, combined Figure 8 , Figure 9 and Figure 10 As shown, the first heat exchanger 210 is provided with multiple guide plates 230. The multiple guide plates 230 are used to divide the first heat exchanger 210 into multiple guide cavities 240, thereby playing a role in diverting the heat exchange medium, which helps to reduce flow resistance and enable the heat exchange medium to circulate effectively in the first heat exchanger 210, further improving the heat exchange effect of the first heat exchanger 210.

[0111] In some embodiments, the guide plate 230 in the first heat exchanger 210 is made of metal so that the guide plate 230 has high thermal conductivity, thereby improving the heat transfer performance of the first heat exchanger 210 and further enhancing the heat exchange effect of the first heat exchanger 210 by setting the guide plate 230.

[0112] It should be noted that because the first heat exchanger 210 has multiple heat exchange chambers 211, the first heat exchanger 210 has multiple corners (such as...). Figure 9 As shown, this corner increases the flow resistance of the heat exchange medium in the first heat exchange element 210, affecting the circulation of the heat exchange medium in the first heat exchange element 210, and thus affecting the heat exchange effect of the first heat exchange element 210.

[0113] To solve the above problems, such as Figure 6 , Figure 7 and Figure 9 As shown, a chamfer is provided at the corner of the first heat exchanger 210 to reduce the flow resistance of the heat exchange medium inside the first heat exchanger 210, so that the heat exchange medium can effectively circulate within the first heat exchanger 210 and improve the heat exchange effect of the first heat exchanger 210.

[0114] In some embodiments, the first heat exchanger 210 is formed by extrusion followed by bending, so that the first heat exchanger 210 is formed as a single piece, reducing the forming difficulty of the first heat exchanger 210, and to a certain extent ensuring the structural strength of the first heat exchanger 210 and extending the service life of the first heat exchanger 210.

[0115] Of course, in some other embodiments, the first heat exchanger 210 can also be injection molded.

[0116] In some embodiments, combined with Figure 9 , Figure 12 and Figure 13 As shown, in the third direction, the extension length of the heat exchange cavity 211 is less than the extension length of the tab 112. This ensures that the extension length of the first heat exchange element 210 in the third direction is less than the extension length of the tab 112. When the tab 112 is placed in the heat exchange cavity 211, part of the tab 112 is easily exposed in the third direction, facilitating the electrical connection between the battery cells 110.

[0117] The electrical connection between the individual battery cells 110 mentioned here can be in series or in parallel, and no specific restrictions are imposed here.

[0118] In some embodiments, combined with Figure 1 , Figure 2 and Figure 4As shown, tabs 112 are located at opposite ends of the battery body 111 in the second direction. The second heat exchanger 220 is movably engaged with the battery body 111 along the first direction and / or the third direction, and the first, second, and third directions intersect. This facilitates the disassembly of the second heat exchanger 220 while preventing interference between the second heat exchanger 220 and the tabs 112 during assembly and disassembly. This reduces the difficulty of assembling and disassembling the second heat exchanger 220 and also avoids damage to the tabs 112, extending their service life.

[0119] In some embodiments, combined with Figure 1 , Figure 3 and Figure 14 As shown, the second heat exchanger 220 is heat-exchange coupled with at least one side wall of the battery body 111. This facilitates heat exchange between the second heat exchanger 220 and the battery body 111, ensuring that the temperature of the battery body 111 is maintained within a suitable temperature range during operation. This not only guarantees the performance of the battery cells 110 but also extends the service life of the battery cells 110, thereby extending the service life of the battery pack 1000.

[0120] In some embodiments, combined with Figure 1 , Figure 3 and Figure 14 As shown, the second heat exchanger 220 extends circumferentially along the battery body 111 so that the second heat exchanger 220 is in heat exchange contact with at least two side walls of the battery body 111. Increasing the heat exchange area between the second heat exchanger 220 and the battery body 111 improves the heat exchange efficiency between the second heat exchanger 220 and the battery body 111, thereby achieving the goal of improving the heat exchange efficiency of the battery cell 110.

[0121] In some embodiments, combined with Figure 11 , Figure 14 and Figure 15 As shown, the second heat exchanger 220 includes two heat exchange plates 221 arranged opposite to each other. The two heat exchange plates 221 are interconnected by a connecting plate 222. The two heat exchange plates 221 and the connecting plate 222 cooperate to form a heat exchange space 223 for accommodating the battery body 111. At least some of the battery cells 110 are disposed within the heat exchange space 223. This allows the second heat exchanger 220 to simultaneously exchange heat with at least two side walls of the battery body 111, increasing the heat exchange area between the second heat exchanger 220 and the battery body 111, thereby improving the heat exchange efficiency between the second heat exchanger 220 and the battery body 111.

[0122] Meanwhile, the two heat exchange plates 221 and the connecting plate 222 work together to enable the second heat exchange element 220 and the battery body 111 to support each other, thereby limiting the mutual positioning of the second heat exchange element 220 and the battery body 111 and improving the positional 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, which allows the cooling medium entering the second heat exchanger 220 to enter the two heat exchange plates 221 in sequence, so that both heat exchange plates 221 and the connecting plate 222 can exchange heat with the battery body 111, thereby improving the working performance of the second heat exchanger 220.

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

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

[0126] In summary, this application limits the displacement of the tab 112 by using the first heat exchanger 210 and the limiting member 300, and limits the displacement of the battery body 111 by using the second heat exchanger 220 and the thermally conductive structural adhesive, thereby limiting the displacement of the battery cell 110, improving the positional stability of the battery cell 110, and ensuring the working performance of the battery cell 110 to a certain extent.

[0127] In some embodiments, combined with Figure 11 , Figure 14 and Figure 15 As shown, the heat exchange space 223 has a second opening 2231 on the side facing the heat exchange plate 221. The second heat exchange component 220 is movably engaged with the battery body 111 through the second opening 2231. This allows for a detachable engagement between the second heat exchange component 220 and the battery body 111, enabling the second heat exchange component 220 to be removed relative to the battery body 111. This facilitates repair or replacement of the second heat exchange component 220 without damaging the layout of the battery cells 110, reducing the maintenance difficulty and cost of the second heat exchange component 220.

[0128] In some embodiments, combined with Figure 11 , Figure 14 and Figure 15 As shown, the two heat exchange plates 221 of the second heat exchanger 220 are arranged opposite 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 opening 2231, so that the second heat exchanger 220 is detachable in the first direction.

[0129] In summary, in the specific example, the first heat exchanger 210 can be removed relative to the tab 112 along a third direction, and the second heat exchanger 220 can be removed relative to the battery body 111 along a first direction. While realizing the detachable connection between the heat exchange assembly 200 and the battery cell 110, it can also avoid mutual interference between the first heat exchanger 210 and the second heat exchanger 220 during disassembly and assembly 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, combined with Figure 11 , Figure 14 and Figure 15 As shown, the second heat exchanger 220 includes multiple heat exchange bodies 224. Each heat exchange body 224 includes two heat exchange plates 221 and a connecting plate 222. The multiple heat exchange bodies 224 are arranged at intervals along the second direction, and adjacent heat exchange bodies 224 are interconnected. The multiple heat exchange bodies 224 work together to regulate the temperature of the battery body 111, while also reducing the amount of material used in the second heat exchanger 220, thereby reducing the operating cost of the second heat exchanger 220. At the same time, it can also reduce the weight of the second heat exchanger 220, which is conducive to the lightweight design of the battery pack 1000 and improves the working performance of the battery pack 1000.

[0131] Meanwhile, by connecting two adjacent heat exchange bodies 224 to each other, multiple heat exchange bodies 224 can also be connected to each other, so that the cooling medium entering the second heat exchanger 220 can enter multiple heat exchange bodies 224 respectively, thereby improving the heat exchange performance of the second heat exchanger 220 and avoiding the output of heat exchange medium to multiple heat exchange bodies 224 individually, thus reducing the difficulty of heat exchange medium circulation.

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

[0133] In some embodiments, combined with Figure 12 , Figure 13 and Figure 14As shown, a second receiving space is formed within the second heat exchanger 220. The second heat exchanger 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 receiving space, and the second outlet 226 is used to discharge the heat exchange medium from the second receiving space. This allows the heat exchange medium within the second heat exchanger 220 to flow along the extension direction of the second heat exchanger 220, thereby achieving heat exchange with the battery body 111 and regulating the temperature of the battery body 111. Simultaneously, the heat exchange medium after heat exchange can be discharged through the second outlet 226, achieving circulation of the heat exchange medium within the second heat exchanger 220, improving the heat exchange effect of the heat exchange medium, and thus improving the heat exchange effect of the second heat exchanger 220, enabling the temperature of the battery body 111 to be effectively maintained within a suitable temperature range.

[0134] Meanwhile, the above-mentioned configuration also allows the first heat exchanger 210 and the second heat exchanger 220 to have separate inlets and outlets, so that during the process of adjusting the temperature of the battery cell 110, the first heat exchanger 210 and the second heat exchanger 220 can be turned on individually or simultaneously.

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

[0136] In addition, since the tab 112 generates more heat, the opening size of the first inlet 212 and the first outlet 213 of the second heat exchanger 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 exchanger 220, realizing zoned thermal management of the battery cell 110, and improving thermal management efficiency.

[0137] In some embodiments, combined with Figure 12 and Figure 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. This allows the liquid storage chamber for storing the heat exchange medium to be located close to the first inlet 212, the first outlet 213, the second inlet 225, and the second outlet 226 simultaneously, reducing the difficulty of circulating the heat exchange medium within 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 located on different sides of the battery cell 110.

[0139] In some embodiments, combined with Figure 14and Figure 15 As shown, the second heat exchanger 220 is provided with multiple guide plates 230. The multiple guide plates 230 are used to divide the second heat exchanger 220 into multiple guide cavities 240, thereby playing a role in diverting the heat exchange medium, which helps to reduce flow resistance and enable the heat exchange medium to circulate effectively in the second heat exchanger 220, further improving the heat exchange effect of the second heat exchanger 220.

[0140] In some embodiments, the guide plate 230 in the second heat exchanger 220 is made of metal. Its beneficial effects can be seen from the beneficial effects of the guide plate 230 in the first heat exchanger 210 being made of metal, and will not be repeated here.

[0141] In addition, a chamfer can be provided at the corner of the second heat exchanger 220 to reduce the flow resistance of the heat exchange medium in the second heat exchanger 220, so that the heat exchange medium can effectively circulate in the second heat exchanger 220 and improve the heat exchange effect of the second heat exchanger 220.

[0142] In some embodiments, the second heat exchanger 220 can be formed by extrusion and then bending. The beneficial effects are the same as those of the first heat exchanger 210 formed by extrusion and then bending, and will not be repeated here.

[0143] Of course, in some other embodiments, the second heat exchanger 220 can also be injection molded.

[0144] In some embodiments, combined with Figure 1 , Figure 11 and Figure 12 As shown, the battery pack 1000 also includes a frame 400, which encloses a receiving cavity in which the battery cell 110 and the heat exchange assembly 200 are both disposed. This arrangement within the frame 400 facilitates support and protection of the battery cell 110 and the heat exchange assembly 200, improves their positional stability, and extends their service life to some extent.

[0145] In some embodiments, combined with Figure 1 , Figure 11 and Figure 12 As shown, the frame 400 includes two cover plates 410 arranged opposite each other in a third direction, and two side beams 420 spaced apart in a second direction between the two cover plates 410. The two cover plates 410 and the two side beams 420 cooperate to form a receiving cavity, so as to reduce the molding difficulty of the receiving cavity.

[0146] Among them, the two cover plates 410 and the two side beams 420 are the main support and protection components in the battery pack 1000. For easy 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-cast.

[0148] Meanwhile, the cover plate 410 and the side beam 420 can be made by die casting or by using molds.

[0149] In specific examples, combined Figure 1 , Figure 11 and Figure 12 As shown, the battery cell 110 is disposed in the receiving cavity, and the tab 112 of the battery cell 110 is disposed opposite to the side beam 420. The first heat exchanger 210 is disposed between the tab 112 and the side beam 420 and is detachably engaged with the side beam 420. The second heat exchanger 220 is disposed between the battery body 111 and the cover plate 410 and is detachably engaged with the cover plate 410.

[0150] In some embodiments, combined with Figure 1 , Figure 2 and Figure 3 As shown, a guide 500 is provided between the frame 400 and the heat exchange component 200. The guide 500 is used to guide the movement of the heat exchange component 200. This reduces the difficulty of moving the heat exchange component 200, thereby reducing the difficulty of assembling and disassembling the heat exchange component 200, and facilitating the disassembly and assembly of the entire heat exchange component 200 in the later stages.

[0151] Optionally, the guide member 500 is also used to limit the displacement of the heat exchange assembly 200 in the non-moving direction. This ensures that the position of the heat exchange assembly 200 is stable in the non-moving direction, thereby allowing the heat exchange assembly 200 to be stably positioned on the battery cell 110, and to a certain extent ensuring the working performance of the heat exchange assembly 200.

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

[0153] In specific examples, combined Figure 1 and Figure 2As shown, when the guide member 500 is located 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 a third direction and at the same time restrict the displacement of the first heat exchanger 210 in the first direction and the second direction, so as to reduce the difficulty of assembling and disassembling the first heat exchanger 210, and can also limit the first heat exchanger 210, improve the positional stability of the first heat exchanger 210, and thus ensure the working performance of the first heat exchanger 210 to a certain extent.

[0154] In specific examples, combined Figure 1 and Figure 3 As shown, when the guide member 500 is located between the frame 400 and the second heat exchanger 220, the guide member 500 is used to guide the second heat exchanger 220 to move along the first direction and at the same time restrict the displacement of the second heat exchanger 220 in the second direction and the third direction, so as to reduce the difficulty of assembling and disassembling the second heat exchanger 220, and can also limit the second heat exchanger 220, improve the positional stability of the second heat exchanger 220, and thus ensure the working performance of the second heat exchanger 220 to a certain extent.

[0155] In some embodiments, combined with 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 assembly 200. The guide protrusion 510 is disposed in one of the frame 400 and the heat exchange assembly 200, and the guide groove 520 is disposed in the other of the frame 400 and the heat exchange assembly 200. The guide protrusion 510 is movably disposed in the guide groove 520. This means that when the guide protrusion 510 is located on the frame 400, the guide groove 520 is located on the heat exchange assembly 200; when the guide protrusion 510 is located on the heat exchange assembly 200, the guide groove 520 is located on the frame 400, and the guide protrusion 510 is movably located within the guide groove 520. This facilitates the use of the guide protrusion 510 and the guide groove 520 to guide the movement of the heat exchange assembly 200, thereby providing a guiding function for the disassembly and assembly of the heat exchange assembly 200, reducing the difficulty of disassembly and assembly of the heat exchange assembly 200, and enabling the heat exchange assembly 200 to be repaired or replaced without damaging the layout of the battery cell 110.

[0156] In some embodiments, combined with 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 heat exchange component 200 and the frame 400 can be guided and engaged, so as to facilitate the movement of the heat exchange component 200, reduce the difficulty of disassembling and assembling the heat exchange component 200, and 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, improve the positional stability of the heat exchange component 200, and ensure the working performance of the heat exchange component 200 to a certain extent.

[0157] In some embodiments, the guide protrusion 510 is disposed on the heat exchange assembly 200 and formed integrally with the heat exchange assembly 200. This improves the connection strength between the guide protrusion 510 and the heat exchange assembly 200, allowing the guide protrusion 510 to be stably disposed on the heat exchange assembly 200. This facilitates the use of the guide member 500 to guide the movement of the heat exchange assembly 200 and restricts 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 component 200 to form an integral part.

[0159] In some embodiments, the guide protrusion 510 is made of aluminum alloy so that the material of the guide protrusion 510 is the same as that 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 can also be connected by bonding, bolting or other connection methods.

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

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

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

[0164] In some embodiments, combined with Figure 1 , Figure 2 and Figure 3 As shown, the opening of the guide groove 520 facing the frame 400 or the heat exchange assembly 200 is constricted to limit the displacement of the heat exchange assembly 200 in the non-moving direction. That is, when the guide groove 520 is provided on the frame 400, the opening of the guide groove 520 facing the heat exchange assembly 200 is constricted; when the guide groove 520 is provided on the heat exchange assembly 200, the opening of the guide groove 520 facing the frame 400 is constricted. The constriction of the guide groove 520 can facilitate the limiting of the guide protrusion 510 within 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, so that the position of the heat exchange assembly 200 in the non-moving direction is stable, thereby enabling the heat exchange assembly 200 to be stably placed on the battery cell 110, and to a certain extent ensuring the working performance of the heat exchange assembly 200.

[0165] In some embodiments, the shape of the guide protrusion 510 is adapted to the shape of the guide groove 520, so that the guide protrusion 510 is 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, such as Figure 2 As shown, the guide protrusion 510 is formed in the shape of a "T" to facilitate the guide protrusion 510 being positioned and fitted within the guide groove 520.

[0167] Of course, in other embodiments, the guide protrusion 510 may also be shaped as an "I" or a trapezoid, etc. Regardless of the shape, it is sufficient 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 according to the size, limiting strength or guiding strength of the battery pack 1000, etc., and this application does not impose specific restrictions.

[0169] Meanwhile, when the guide protrusion 510 is provided on the heat exchange assembly 200 and the guide groove 520 is provided on the frame 400, in order to strengthen the assembly strength and prevent the heat exchange assembly 200 from having an assembly gap with 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 with bolts. When it is necessary to disassemble the heat exchange assembly 200, the bolts connecting the guide protrusion 510 and the frame 400 should be removed first.

[0170] In some embodiments, the frame 400 further encloses a third opening that communicates with the receiving cavity, through which the second heat exchanger 220 is detachably engaged with the battery body 111. This allows for the maintenance or replacement of the second heat exchanger 220 without disassembling the frame 400, further reducing the difficulty and cost of maintaining the second heat exchanger 220.

[0171] In some embodiments, the third opening is located on one side of the receiving cavity in the first direction, so that the second heat exchanger 220 is detachable in the first direction.

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

[0173] When an outer casing is provided, the outer casing can be removed first when disassembling the first heat exchanger 210 and / or the second heat exchanger 220.

[0174] In specific examples, combined 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 back and forth along the first direction. 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 the first heat exchanger 210 and the second heat exchanger 220 of the heat exchange assembly 200 can also be repaired or replaced without damaging the structure of the battery pack 1000.

[0175] Specifically, when the second heat exchanger 220 needs to be removed, the outer casing is first removed, and then the second heat exchanger 220 is moved along the first direction to remove it without disassembling the frame 400 and the battery cell 110. When the first heat exchanger 210 needs to be removed, the outer casing is first removed, then the second heat exchanger 220 is removed, and finally the first heat exchanger 210 is moved along the third direction to remove it without disassembling the frame 400 and the battery cell 110. This allows the first heat exchanger 210 and the second heat exchanger 220 of the heat exchange assembly 200 to be repaired or replaced without damaging the structure of the battery pack 1000.

[0176] It should also be noted that, in combination Figure 11 , Figure 12 and Figure 13As shown, since the second inlet 225 and the second outlet 226 of the second heat exchanger 220 are both located 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 from obstructing the movement of the second heat exchanger 220, the outer diameter of the second inlet 225 and the second outlet 226 is set to not exceed the thickness of the second heat exchanger 220.

[0177] When the thickness of the second heat exchanger 220 is adjusted, the outer diameters of the second inlet 225 and the second outlet 226 can be adjusted accordingly, 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 exchanger 220.

[0178] In some embodiments, combined with Figure 1 , Figure 5 and Figure 11 As shown, the battery pack 1000 includes multiple sets of battery cell groups 100 arranged along a second direction. Each set of battery cell groups 100 has multiple battery cells 110 arranged along a first direction, which intersects with the second direction. This design optimizes the use of space within the battery pack 1000, ensuring that a larger number of battery cells 110 can be installed within the battery pack 1000, thereby increasing the capacity of the battery pack 1000 and ultimately improving its performance.

[0179] It is worth noting that in this application, multiple battery cells 110 in each battery cell group 100 are arranged along the first direction so that the arrangement of multiple battery cells 110 is consistent with the disassembly direction of the second heat exchanger 220. This allows the heat exchange plate 221 of the second heat exchanger 220 to cover multiple battery cells 110 at the same time, so as to exchange heat with multiple battery cells 110 and reduce the heat exchange difficulty of multiple battery cells 110.

[0180] In other words, by making the second heat exchanger 220 detachable along the first direction, this application not only makes the second heat exchanger 220 detachable, but also enables the second heat exchanger 220 to exchange heat with multiple battery cells 110 simultaneously.

[0181] Furthermore, when multiple battery cells 110 are arranged along the first direction, combined with Figure 1 , Figure 2 and Figure 9 As shown, in the first direction, the first heat exchanger 210 located between two adjacent heat exchange chambers 211 contacts the side of the battery body 111, further improving the heat exchange performance of the first heat exchanger 210.

[0182] In some embodiments, combined with Figure 1 , Figure 5 and Figure 11As shown, the frame 400 also includes a longitudinal beam 430, which is located between two adjacent battery cell groups 100 to separate the two adjacent battery cell groups 100. On the one hand, this avoids short circuits 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 and improve the positional 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 be referred to the connection method between the cover plate 410 and the side beam 420 described above, and will not be repeated here.

[0184] Meanwhile, the side beam 420 can be manufactured by die casting or using molds.

[0185] In specific examples, combined Figure 1 , Figure 5 and Figure 11 As shown, the battery pack 1000 includes two sets of battery cell groups 100, each set of battery cell groups 100 having fifty battery cells 110. The battery cells 110 in the same set of battery cell groups 100 are connected in series, and the two sets of battery cell groups 100 are connected in parallel. The longitudinal beam 430 and 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 multiple components, each corresponding to one of the multiple battery cell groups 100. The first heat exchangers 210 are arranged around the outer periphery of the battery cell groups 100. This allows the temperature of each of the multiple battery cell groups 100 to be regulated through the first heat exchangers 210, thereby maintaining the temperature of each of the multiple battery cells 110 within the multiple battery cell groups 100 within a suitable temperature range and improving the working performance of the battery cell groups 100.

[0187] In some embodiments, combined with Figure 8 and Figure 9 As shown, two adjacent first heat exchange elements 210 are interconnected. This allows the heat exchange medium to flow between multiple first heat exchange elements 210, improving the heat exchange performance of the first heat exchange elements 210 and avoiding the output of heat exchange medium into multiple first heat exchange elements 210 individually, thus reducing the difficulty of heat exchange medium circulation.

[0188] In summary, the heat exchange assembly 200 of the battery pack 1000 of this application includes a first heat exchange component 210 for dissipating heat from the tabs 112 and a second heat exchange component 220 for dissipating heat from the battery body 111. The first heat exchange component 210 includes a first inlet 212, a first outlet 213 and a guide plate 230. The first heat exchange component 210 is also provided with a guide protrusion 510. The second heat exchange component 220 includes a second inlet 225, a second outlet 226 and a guide plate 230. The second heat exchange component 220 is also provided with a guide protrusion 510. The second heat exchange component 220 is embedded between two cover plates 410 through the guide protrusion 510, thereby achieving connection with the two cover plates 410. The first heat exchange component 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 ensure that the guide protrusion 510 is fully 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 exchanger 210 and the second heat exchanger 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, while the first heat exchanger 210 is mainly responsible for thermal management of each side of the battery cell 110 and the tab 112 in the second direction.

[0191] In summary, the thermal management system of the battery pack 1000 of this application adopts a first heat exchanger 210 and a second heat exchanger 220 with guide protrusions 510. The first heat exchanger 210 and the second heat exchanger 220 perform zoned thermal management of the battery cells 110, which can effectively ensure that the temperature difference between any two points of the battery cells 110 is within a reasonable range. The first heat exchanger 210 and the second heat exchanger 220 can be repaired and replaced without damaging the structure of the battery pack 1000. Furthermore, the first heat exchanger 210 and the second heat exchanger 220 can be opened independently, which effectively improves the space utilization and energy utilization of the thermal management system. In addition, the first heat exchanger 210 and the second heat exchanger 220 can also strengthen the internal support of the battery pack 1000.

[0192] The electrical equipment according to embodiments of the present invention is described below.

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

[0194] Among them, the battery pack 1000 is the aforementioned battery pack 1000, and the specific structure of the battery pack 1000 will not be described in detail here.

[0195] As can be seen from the above structure, the electrical equipment in this embodiment of the invention can be powered by the aforementioned battery pack 1000, 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 in this application can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc.

[0197] In a specific example, the electrical equipment is a vehicle, and the battery pack 1000 can serve as the vehicle's operating power source or as its driving power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0198] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0199] Figure 1 , Figure 5 and Figure 11 The above description shows two sets of battery cell packs 100 for illustrative purposes. However, after reading the above technical solution, a person skilled in the art will obviously understand that the solution can be applied to a technical solution with three or more sets of battery cell packs 100, which would also fall within the protection scope of this invention.

[0200] The battery pack 1000 and other components of the electrical equipment having 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, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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

Claims

1. A battery pack, characterized in that, include: A battery cell (110) has a battery body (111) and a tab (112) connected to the battery body (111). A heat exchange assembly (200) is detachably disposed on the battery cell (110), and the heat exchange assembly (200) exchanges heat with the battery body (111) and the electrode tab (112) respectively; The heat exchange assembly (200) includes a first heat exchange element (210), which is movably disposed on the tab (112); at least a portion of the first heat exchange element (210) is disposed on opposite sides of the tab (112) in a first direction to limit the displacement of the tab (112) in the first direction; the first heat exchange element (210) is movably engaged with the tab (112) along a second direction and / or a third direction, wherein the first direction, the second direction, and the third direction intersect. At least a portion of the first heat exchanger (210) protrudes away from the tab (112) to form a heat exchange cavity (211) facing the tab (112), the heat exchange cavity (211) opening on one side facing the tab (112), and the tab (112) being disposed in the heat exchange cavity (211) through the opening.

2. The battery pack according to claim 1, characterized in that, The heat exchange assembly (200) further includes a second heat exchange element (220), which is movably disposed on the battery body (111).

3. The battery pack according to claim 1, characterized in that, A limiting member (300) is provided between the electrode tab (112) and the first heat exchanger (210). The limiting member (300) is engaged with the electrode tab (112) to limit the displacement of the electrode tab (112) in the first direction.

4. The battery pack according to claim 3, characterized in that, The limiting component (300) is a thermally conductive and insulating component.

5. The battery pack according to claim 1, characterized in that, The battery body (111) is provided with tabs (112) at both ends of the opposite direction in the second direction, and the first heat exchanger (210) is provided with a plurality of heat exchange chambers (211) corresponding one-to-one with the tabs (112).

6. The battery pack according to claim 1, characterized in that, The tab (112) extends along the third direction, and the heat exchange cavity (211) has a first opening (2111) at at least one end in the third direction. The first heat exchange element (210) is movably engaged with the tab (112) through the first opening (2111).

7. The battery pack according to claim 6, characterized in that, In the third direction, the extension length of the heat exchange cavity (211) is less than the extension length of the tab (112).

8. The battery pack according to claim 2, characterized in that, The tabs (112) are located at opposite ends of the battery body (111) in a second direction, and the second heat exchanger (220) is movably engaged with the battery body (111) along a first direction and / or a third direction, wherein the first direction, the second direction and the third direction intersect.

9. The battery pack according to claim 8, characterized in that, The second heat exchanger (220) is in heat exchange cooperation with at least one side wall of the battery body (111).

10. The battery pack according to claim 9, characterized in that, The second heat exchanger (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). The two heat exchange plates (221) and the connecting plate (222) cooperate to form a heat exchange space (223) for accommodating the battery body (111). At least a portion of the battery cells (110) are disposed in the heat exchange space (223).

11. The battery pack according to claim 10, characterized in that, The heat exchange space (223) has a second opening (2231) on the side facing the heat exchange plate (221), and the second heat exchange element (220) is movably engaged with the battery body (111) through the second opening (2231).

12. The battery pack according to claim 11, characterized in that, The second heat exchanger (220) includes a plurality of heat exchange bodies (224), each of the heat exchange bodies (224) 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 adjacent heat exchange bodies (224) are interconnected.

13. The battery pack according to claim 2, characterized in that, The heat exchange assembly (200) is formed as a heat exchange plate, the heat exchange plate is hollow inside, and a plurality of spaced guide plates (230) are provided inside the heat exchange assembly (200) to separate a plurality of guide cavities (240) extending along its guide direction.

14. The battery pack according to claim 2, characterized in that, The first heat exchanger (210) has a first accommodating space. 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 accommodating space. The first inlet (212) is used to guide the heat exchange medium into the first accommodating space, and the first outlet (213) is used to discharge the heat exchange medium in the first accommodating space. The second heat exchanger (220) has a second receiving space, and the second heat exchanger (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 receiving space, and the second outlet (226) is used to discharge the heat exchange medium in the second receiving space.

15. The battery pack according to claim 14, 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).

16. The battery pack according to any one of claims 10-15, characterized in that, The battery pack also includes a frame (400) that encloses a receiving cavity, in which the battery cell (110) and the heat exchange assembly (200) are both located.

17. The battery pack according to claim 16, characterized in that, A guide (500) is provided between the frame (400) and the heat exchange assembly (200), and the guide (500) is used to guide the movement of the heat exchange assembly (200); The guide (500) is also used to limit the displacement of the heat exchange assembly (200) in the non-moving direction.

18. The battery pack according to claim 17, characterized in that, The guide member (500) includes a guide protrusion (510) and a guide groove (520) extending along the moving direction of the heat exchange assembly (200). The guide protrusion (510) is disposed in one of the frame (400) and the heat exchange assembly (200), and the guide groove (520) is disposed in the other of the frame (400) and the heat exchange assembly (200). The guide protrusion (510) is movably disposed within the guide groove (520).

19. The battery pack according to claim 18, characterized in that, The guide protrusion (510) is provided on the heat exchange assembly (200) and is integrally formed with the heat exchange assembly (200).

20. The battery pack according to claim 18, characterized in that, The guide groove (520) has a constricted opening on the side facing the frame (400) or the heat exchange assembly (200) to limit the displacement of the heat exchange assembly (200) in the non-moving direction.

21. The battery pack according to claim 16, characterized in that, The frame (400) also encloses a third opening that communicates with the receiving cavity, and the second heat exchanger (220) is detachably engaged with the battery body (111) through the third opening.

22. The battery pack according to claim 16, characterized in that, The battery pack includes multiple sets of battery cell groups (100) arranged along a second direction, and each set of battery cell groups (100) has multiple battery cells (110) arranged along a first direction, which intersects with the second direction. The first heat exchanger (210) includes a plurality of them, and the plurality of first heat exchangers (210) correspond one-to-one with the plurality of battery cell groups (100). The first heat exchangers (210) surround the outer periphery of the battery cell group (100).

23. The battery pack according to claim 22, characterized in that, The two adjacent first heat exchangers (210) are interconnected.

24. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1-23.

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