Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, the battery pack includes: a first battery module, the first battery module includes: a first cross beam; the second battery module and the first battery module are stacked in the first direction, the second battery module comprises a second cross beam, and the second cross beam and the first cross beam are oppositely arranged and fixed in the first direction; the heat exchange plate is arranged between the first battery module and the second battery module, a groove is formed in the side, facing the second battery module, of the heat exchange plate, the second cross beam is provided with a supporting part, and the supporting part is supported in the groove. The supporting part is supported in the groove, at the moment, the second cross beam is conveniently positioned on the heat exchange plate according to cooperation of the groove and the supporting part, the perpendicularity of the first cross beam and the second cross beam can be improved, in addition, the heat exchange plate is horizontally arranged, the vertical height of the battery pack occupied by the heat exchange plate can be reduced, and the space of the battery pack in the height direction is saved; therefore, the volume energy density of the battery pack can be improved.

Description

Technical Field

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

[0002] In the related art, a heat exchange plate is provided on the bottom surface of the first battery module of the battery pack, and fixed brackets are provided at both ends of the length direction of the heat exchange plate. The first battery module end plate, the fixed bracket, the module bracket and the second battery module end plate are connected to the battery pack in the vertical direction through bolts, and the middle bracket supports the heat exchange plate.

[0003] However, it is inconvenient to align the crossbeams when installing the battery module, and after the battery module is assembled, the overall height of the battery pack is high, which is inconvenient to use the battery pack. Utility Model Content

[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 with a relatively low overall height and a high volume energy density.

[0005] The utility model further proposes an electrical device.

[0006] According to the battery pack of the present invention, it includes: a first battery module, the first battery module includes: a first crossbeam; a second battery module, the second battery module and the first battery module are stacked in a first direction, the second battery module includes: a second crossbeam, the second crossbeam and the first crossbeam are arranged opposite to and fixed in the first direction; a heat exchange plate, the heat exchange plate is arranged between the first battery module and the second battery module, the heat exchange plate is provided with a groove on the side facing the second battery module, and the second crossbeam is provided with a support portion, and the support portion is supported in the groove.

[0007] According to the battery pack of the present invention, the supporting portion is supported in the groove, which makes it easy to position the second beam on the heat exchange plate according to the cooperation between the groove and the supporting portion, and can improve the verticality of the first beam and the second beam. In addition, the heat exchange plate is arranged horizontally, and at this time, the vertical height of the battery pack occupied by the heat exchange plate can be reduced, saving space in the height direction of the battery pack, thereby improving the volume energy density of the battery pack.

[0008] In some examples of the present invention, the heat exchange plate includes: a main board and a flow channel plate, the main board is arranged between the first battery module and the second battery module, the flow channel plate is arranged on the side of the main board facing the second battery module, and the flow channel plate is provided with the groove.

[0009] In some examples of the present invention, there are multiple support parts, which are spaced apart from each other, and an avoidance groove is defined between two adjacent support parts. The avoidance groove is arranged opposite to the side of the flow channel plate facing the second battery module.

[0010] In some examples of the present invention, the flow channel plate is provided with a flow channel portion extending toward the second crossbeam, and the flow channel portion extends into the avoidance groove.

[0011] In some examples of the present invention, the battery pack further includes: a water inlet and a water outlet, wherein the water inlet and the water outlet are respectively connected to the heat exchange plate, and the water inlet and the water outlet are integrated at one end of the second direction of the heat exchange plate; or the water inlet and the water outlet are respectively arranged at both ends of the second direction of the heat exchange plate, and the second direction is perpendicular to the first direction.

[0012] In some examples of the present invention, the battery pack further includes: a connecting member, wherein the connecting member passes through the second crossbeam into the first crossbeam along a first direction, and the connecting member is fixed in the first crossbeam.

[0013] In some examples of the present invention, a connecting portion is provided in the first crossbeam, and the connecting member is fixed to the connecting portion.

[0014] In some examples of the present invention, a first positioning portion is provided on a side of the first beam facing the second beam, and a second positioning portion is provided on a side of the second beam facing the first beam, and the first positioning portion is positioned and matched with the second positioning portion.

[0015] In some examples of the present invention, one of the first positioning portion and the second positioning portion is a positioning column, and the other of the first positioning portion and the second positioning portion is a positioning groove.

[0016] In some examples of the present invention, the first battery module also includes: a plurality of first battery cells, the plurality of first battery cells are arranged in sequence in the second direction, and the first cross beam is at least provided at both ends of the plurality of first battery cells in the second direction; the second battery module also includes: a plurality of second battery cells, the plurality of second battery cells are arranged in sequence in the second direction, and the second cross beam is at least provided at both ends of the plurality of second battery cells in the second direction.

[0017] In some examples of the present invention, the battery pack further includes: an insulating member, wherein the insulating member is at least disposed on a side of the first beam adjacent to the first battery cell, and the insulating member is at least disposed on a side of the second beam adjacent to the second battery cell.

[0018] In some examples of the present invention, the insulating member is a plastic member or a composite material member.

[0019] In some examples of the present invention, the battery pack further includes: a heat insulating member, wherein the heat insulating member is at least arranged on a side of the first beam adjacent to the first battery cell, and the heat insulating member is at least arranged on a side of the second beam adjacent to the second battery cell.

[0020] In some examples of the present invention, the battery pack further includes: a tray, the plurality of the first battery cells are adhered to the tray, and the plurality of the second battery cells are adhered to the heat exchange plate.

[0021] In some examples of the present invention, the first crossbeam and the pallet are connected via fasteners; or the first crossbeam and the pallet are adhesively connected; or the first crossbeam and the pallet are welded.

[0022] In some examples of the present invention, the first battery cell includes: a first shell and a first cover assembly, the first cover assembly is fixed on the first shell, the large surfaces of the first shells of the plurality of first battery cells are arranged relative to each other, and the narrow surfaces of the first shells of the plurality of first battery cells are all bonded to the tray; the second battery cell includes: a second shell and a second cover assembly, the second cover assembly is fixed on the second shell, the large surfaces of the second shells of the plurality of second battery cells are arranged relative to each other, and the narrow surfaces of the second shells of the plurality of second battery cells are all bonded to the heat exchange plate.

[0023] In some examples of the present invention, one of the first beam and the second beam is an extruded beam, and the other of the first beam and the second beam is a bent beam.

[0024] The electrical equipment according to the present invention includes: the battery pack described above.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0028] Figure 2 is a schematic diagram of a partial structure of a battery pack according to an embodiment of the present utility model;

[0029] Figure 3It is an enlarged view of the local structure of the battery pack according to an embodiment of the present utility model.

[0030] Reference numerals:

[0031] 1. Battery pack;

[0032] 10. First battery module; 100. First crossbeam; 101. Connecting portion; 102. First battery cell; 103. First shell; 104. First cover assembly; 20. Second battery module; 200. Second crossbeam; 201. Avoidance groove; 202. Supporting portion; 203. Second battery cell; 204. Second shell; 205. Second cover assembly; 30. Heat exchange plate; 300. Flow channel portion; 301. Main board; 302. Flow channel plate; 303. Groove; 40. Water inlet; 50. Water outlet; 60. Connecting piece; 70. Tray. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0034] Reference below Figure 1-Figure 3 A battery pack 1 according to an embodiment of the present invention is described.

[0035] like Figure 1-Figure 3 As shown, a battery pack 1 according to an embodiment of the present invention includes a first battery module 10, a second battery module 20, and a heat exchange plate 30. The first and second battery modules 10, 20 are the main components of the battery pack 1, primarily contributing to improved energy density and power density. The heat exchange plate 30 is a component of the battery pack 1, primarily dissipating heat, maintaining a uniform temperature within the battery pack 1, and improving the performance and safety of the battery pack 1.

[0036] like Figure 1-Figure 3As shown, the first battery module 10 includes: a first beam 100, the second battery module 20 and the first battery module 10 are stacked in the first direction, and the second battery module 20 includes: a second beam 200, and the second beam 200 and the first beam 100 are arranged opposite and fixed in the first direction. It should be noted that the first crossbeam 100 is a component of the first battery module 10 and is primarily used to mount other components, thereby enhancing the rigidity of the battery pack 1. The second battery module 20 is stacked with the first battery module 10 in the first direction. In the first direction, the second battery pack 20 is stacked above and below the first battery pack 10. The second crossbeam 200 is a component of the second battery module 20 and is primarily used to mount other components, thereby enhancing the rigidity of the battery pack 1. The second crossbeam 200 is positioned opposite and fixed to the first crossbeam 100 in the first direction. In the first direction, the second crossbeam 200 is positioned opposite and above the first crossbeam 100 and is fixed to the first crossbeam 100. In this case, no additional connecting bracket is required between the first battery module 10 and the second battery module 20, resulting in a simple overall structure and reducing the production cost of the battery pack 1. The first direction refers to the vertical direction.

[0037] like Figure 1 and Figure 3 As shown, the heat exchange plate 30 is disposed between the first battery module 10 and the second battery module 20. A groove 303 is provided on the side of the heat exchange plate 30 facing the second battery module 20. The second crossbeam 200 is provided with a support portion 202, which is supported within the groove 303. The heat exchange plate 30 is disposed between the first battery module 10 and the second battery module 20. In this case, the heat exchange plate 30 can dissipate heat from the first battery module 10 and the second battery module 20, and can simultaneously control the temperature of the first battery module 10 and the second battery module 20.

[0038] The groove 303 can be mainly used to install other components, and the support part 202 can mainly play a supporting role. The groove 303 is provided on the side of the heat exchange plate 30 facing the second battery module 20, and the support part 202 is supported in the groove 303. At this time, it is convenient for the second beam 200 to be positioned on the heat exchange plate 30 according to the cooperation between the groove 303 and the support part 202, which can improve the verticality of the first beam 100 and the second beam 200. In addition, the heat exchange plate 30 is horizontally arranged. At this time, the vertical height of the battery pack 1 occupied by the heat exchange plate 30 can be reduced, thereby improving the volume energy density of the battery pack 1.

[0039] Specifically, if Figure 3As shown, the heat exchange plate 30 includes: a main board 301 and a flow channel plate 302. The main board 301 is arranged between the first battery module 10 and the second battery module 20. The flow channel plate 302 is arranged on the side of the main board 301 facing the second battery module 20. The flow channel plate 302 is provided with a groove 303. The main board 301 is the main component of the heat exchange plate 30, which mainly plays the role of heat dissipation, maintaining the temperature balance of the battery pack 1, and improving the performance and safety of the battery pack 1. In addition, other components can be installed and set. The flow channel plate 302 can mainly optimize the fluid flow in the battery pack 1 and improve the performance and efficiency of the battery pack 1. The main board 301 is arranged between the first battery module 10 and the second battery module 20. At this time, the main board 301 can achieve heat dissipation of the first battery module 10 and the second battery module 20, maintain the temperature balance of the battery pack 1, and improve the battery To enhance the performance and safety of package 1, the flow channel plate 302 is arranged on the side of the main board 301 facing the second battery module 20. The flow channel plate 302 is arranged on the main board 301 and is close to the second battery module 20. The flow channel plate 302 is provided with a groove 303. At this time, the flow channel plate 302 can be matched with the second crossbeam 200, and the matching between the support part 202 and the groove 303 will also be simpler and more convenient. In addition, the flow channel plate 302 is easy to install and disassemble, has strong practicality, and can make the connection between the flow channel plate 302 and the second crossbeam 200 firm and reliable.

[0040] Among them, Figure 3 As shown, there are multiple support portions 202, which are spaced apart. A clearance groove 201 is defined between two adjacent support portions 202. The clearance groove 201 is located opposite the side of the flow channel plate 302 facing the second battery module 20. The second crossbeam 200 is provided with multiple support portions 202, which can improve the support stability of the second crossbeam 200. The spacing between the multiple support portions 202 can prevent interference between the multiple support portions 202 and expand the distribution range of the multiple support portions 202, further improving the support stability of the second crossbeam 200. The clearance groove 201 is defined between two adjacent support portions 202. The clearance groove 201 can serve as a clearance. The clearance groove 201 is located opposite the side of the flow channel plate 302 facing the second battery module 20. This allows the clearance groove 201 to avoid the flow channel plate 302, thereby better positioning the flow channel plate 302.

[0041] In addition, if Figure 3As shown, the flow channel plate 302 is provided with a flow channel portion 300 extending toward the second crossbeam 200, and the flow channel portion 300 extends into the avoidance groove 201. The flow channel plate 302 is provided with a flow channel portion 300 extending toward the second crossbeam 200, and the flow channel portion 300 extends into the avoidance groove 201. This facilitates positioning of the second crossbeam 200. The connection method of the flow channel portion 300 extending into the avoidance groove 201 is simple and convenient. In this case, the heat exchange plate 30 is easy to install and disassemble, has strong practicality, and can make the connection between the heat exchange plate 30 and the second crossbeam 200 firm and reliable.

[0042] Of course, if Figure 1 and Figure 3 As shown, the battery pack 1 further includes: a water inlet member 40 and a water outlet member 50, the water inlet member 40 and the water outlet member 50 are respectively connected to the heat exchange plate 30, the water inlet member 40 and the water outlet member 50 are integrated at one end of the second direction of the heat exchange plate 30, or the water inlet member 40 and the water outlet member 50 are respectively arranged at both ends of the second direction of the heat exchange plate 30, and the second direction is perpendicular to the first direction. It should be noted that the water inlet 40 allows the cooling medium to flow into the heat exchange plate 30, and the water outlet 50 allows the cooling medium to flow out of the heat exchange plate 30. The water inlet 40 and the water outlet 50 are respectively connected to the heat exchange plate 30, in which case the cooling medium can flow into and out of the heat exchange plate 30. The water inlet 40 and the water outlet 50 are integrated at one end of the heat exchange plate 30 in the second direction, or the water inlet 40 and the water outlet 50 are respectively arranged at both ends of the heat exchange plate 30 in the second direction. The water inlet 40 and the water outlet 50 can be arranged on the heat exchange plate 30 in two ways: one is an integrated arrangement of the water inlet 40 and the water outlet 50, in which case the water inlet 40 and the water outlet 50 are arranged at one end of the heat exchange plate 30 in the second direction, which can improve the safety and convenience of the battery pack 1; the other is a second direction in which the water inlet 40 and the water outlet 50 are respectively arranged at both ends of the heat exchange plate 30, and the second direction is perpendicular to the first direction. The second direction refers to the horizontal direction.

[0043] Furthermore, if Figure 3 As shown, the battery pack 1 further includes a connector 60, which passes through the second crossbeam 200 along the first direction to the inside of the first crossbeam 100, and is fixed inside the first crossbeam 100. The connector 60 mainly serves a connecting function. The connector 60 passes through the second crossbeam 200 along the first direction to the inside of the first crossbeam 100. In the first direction, the connector 60 passes between the first crossbeam 100 and the second crossbeam 200. The second crossbeam 200 is connected to the corresponding first crossbeam 100 through the connector 60. The connector 60 is fixed inside the first crossbeam 100. The connector 60 is located inside both the first crossbeam 100 and the second crossbeam 200, and is fixed inside the first crossbeam 100. The connector 60 may be a bolt.

[0044] In addition, Figure 3 As shown, a connecting portion 101 is provided in the first crossbeam 100, and the connecting member 60 is fixed to the connecting portion 101. The connecting portion 101 mainly serves as a connection, and the connecting member 60 is fixed to the connecting portion 101. In this case, the first crossbeam 100 and the connecting member 60 are easy to install and disassemble, have strong practicality, and are structurally reliable. In addition, the connecting member 60 can be fixed in the first crossbeam 100.

[0045] Optionally, a first positioning portion is provided on the side of the first crossbeam 100 facing the second crossbeam 200, and a second positioning portion is provided on the side of the second crossbeam 200 facing the first crossbeam 100, wherein the first positioning portion and the second positioning portion are positioned and cooperated with each other. One of the first positioning portion and the second positioning portion is a positioning post, and the other of the first positioning portion and the second positioning portion is a positioning slot. For example, the first positioning portion is a positioning post, and the second positioning portion is a positioning slot. In this way, the cooperation between the positioning post and the positioning slot can make the pre-fixation between the first crossbeam 100 and the second crossbeam 200 simpler and more convenient, thereby improving assembly efficiency.

[0046] It should be noted that if Figure 1-Figure 3 As shown, the first battery module 10 also includes: a plurality of first battery cells 102, the plurality of first battery cells 102 are arranged in sequence in the second direction, and the first cross beam 100 is at least provided at both ends of the second direction of the plurality of first battery cells 102; the second battery module 20 also includes: a plurality of second battery cells 203, the plurality of second battery cells 203 are arranged in sequence in the second direction, and the second cross beam 200 is at least provided at both ends of the second direction of the plurality of second battery cells 203. It should be noted that the multiple first battery cells 102 are core components inside the first battery module 10, which can play a role in storing electrical energy. The multiple first battery cells 102 are arranged in sequence in the second direction. In the second direction, the multiple first battery cells 102 are arranged in sequence. The first beam 100 is at least set at both ends of the multiple first battery cells 102 in the second direction. At this time, the rigidity of the battery pack 1 can be enhanced. In the second direction, the first beam 100 is at least set at both ends of the multiple first battery cells 102. The multiple second battery cells 203 are core components inside the second battery module 20, which can play a role in storing electrical energy. The multiple second battery cells 203 are arranged in sequence in the second direction. In the second direction, the multiple second battery cells 203 are arranged in sequence. The second beam 200 is at least set at both ends of the multiple second battery cells 203 in the second direction. In the second direction, the second beam 200 is at least set at both ends of the multiple second battery cells 203. In this way, the rigidity of the battery pack 1 can be enhanced.

[0047] In addition, the battery pack 1 further includes: an insulating member, which is provided at least on the side of the first crossbeam 100 adjacent to the first battery cell 102, and at least on the side of the second crossbeam 200 adjacent to the second battery cell 203. The insulating member can mainly play an insulating and heat-isolating role. The insulating member is provided at least on the side of the first crossbeam 100 adjacent to the first battery cell 102, and at least on the side of the second crossbeam 200 adjacent to the second battery cell 203. The first crossbeam 100 and the second crossbeam 200 are both provided with insulating members, and the insulating member is provided on the side of the first crossbeam 100 adjacent to the first battery cell 102 and the side of the second crossbeam 200 adjacent to the second battery cell 203. In this way, the insulating member can better insulate and heat-insulate the first battery cell 102 and the second battery cell 203, thereby achieving insulation and heat insulation of the battery pack 1.

[0048] Optionally, the insulating member is a plastic member or a composite member. Plastic members are lightweight and have good electrical insulation properties, while composite members have excellent physical properties. By configuring the insulating member as a plastic member or a composite member, the insulating member can have good electrical and thermal insulation properties, and the insulating member is more suitable for actual working conditions.

[0049] Specifically, the battery pack 1 further includes: a thermal insulation member, which is provided at least on the side of the first crossbeam 100 adjacent to the first battery cell 102, and at least on the side of the second crossbeam 200 adjacent to the second battery cell 203. The thermal insulation member can mainly play a role in heat insulation and heat preservation. The thermal insulation member is provided at least on the side of the first crossbeam 100 adjacent to the first battery cell 102, and at least on the side of the second crossbeam 200 adjacent to the second battery cell 203. The first crossbeam 100 and the second crossbeam 200 are both provided with thermal insulation members, and the thermal insulation members are provided on the side of the first crossbeam 100 adjacent to the first battery cell 102 and the side of the second crossbeam 200 adjacent to the second battery cell 203. In this way, the thermal insulation member can better insulate and preserve the heat of the first battery cell 102 and the second battery cell 203, thereby achieving heat insulation and heat preservation of the battery pack 1. The thermal insulation member can be made of thermal insulation cotton.

[0050] Among them, Figure 1-Figure 3 As shown, the battery pack 1 further includes a tray 70, a plurality of first battery cells 102 bonded to the tray 70, and a plurality of second battery cells 203 bonded to the heat exchange plate 30. The tray 70 is primarily used to mount other components. The plurality of first battery cells 102 bonded to the tray 70 facilitates the installation and placement of the first battery cells 102 and ensures the stability of the first battery cells 102. The plurality of second battery cells 203 bonded to the heat exchange plate 30 dissipates heat from the first battery module 10 and the second battery module 20, allowing for simultaneous temperature control of the first battery module 10 and the second battery module 20. Furthermore, the installation stability of the second battery cells 203 is ensured.

[0051] According to an optional embodiment of the present invention, the first crossbeam 100 and the tray 70 are connected by fasteners, or are bonded, or are welded. In other words, the first crossbeam 100 and the tray 70 can be fixed by fasteners, bonding, or welding, which makes the first crossbeam 100 and the tray 70 secure and reliable. Of course, the first crossbeam 100 and the tray 70 can also be connected by snap-fitting or other means to improve the convenience of assembly between the first crossbeam 100 and the tray 70.

[0052] In addition, if Figure 3 As shown, the first battery cell 102 includes: a first shell 103 and a first cover assembly 104, the first cover assembly 104 is fixed on the first shell 103, the large surfaces of the first shells 103 of the multiple first battery cells 102 are arranged relative to each other, and the narrow surfaces of the first shells 103 of the multiple first battery cells 102 are all bonded to the tray 70, and the second battery cell 203 includes: a second shell 204 and a second cover assembly 205, the second cover assembly 205 is fixed on the second shell 204, the large surfaces of the second shells 204 of the multiple second battery cells 203 are arranged relative to each other, and the narrow surfaces of the second shells 204 of the multiple second battery cells 203 are all bonded to the heat exchange plate 30.

[0053] It should be noted that the first shell 103 is the main part of the first battery cell 102, which can mainly play the role of protection, isolation, heat dissipation and electrical insulation. The first cover assembly 104 can mainly improve the overall safety of the first battery module 10. The first battery cell 102 includes: a first shell 103 and a first cover assembly 104, which can improve the convenience of assembling the battery pack 1. The first cover assembly 104 is fixed on the first shell 103. The first cover assembly 104 is installed on the first shell 103. The large surfaces of the first shells 103 of the multiple first battery cells 102 are relatively arranged, and the narrow surfaces of the first shells 103 of the multiple first battery cells 102 are all bonded to the tray 70. The multiple first battery cells 102 are relatively arranged through the large surfaces of the first shell 103. The multiple first battery cells 102 are bonded to the tray 70 through the narrow surfaces of the first shell 103. At this time, the installation setting of the first shells 103 of the multiple first battery cells 102 is more practical. Working conditions, the second shell 204 is the main part of the second battery cell 203, which can mainly play the role of protection, isolation, heat dissipation and electrical insulation. The second cover assembly 205 can mainly improve the overall safety of the second battery module 20. The second battery cell 203 includes: a second shell 204 and a second cover assembly 205, which can improve the convenience of assembling the battery pack 1. The second cover assembly 205 is fixed on the second shell 204. The second cover assembly 205 is installed on the second shell 204. The large surfaces of the second shells 204 of the multiple second battery cells 203 are relatively arranged, and the narrow surfaces of the second shells 204 of the multiple second battery cells 203 are all bonded to the heat exchange plate 30. The multiple second battery cells 203 are relatively arranged through the large surfaces of the second shell 204. The multiple second battery cells 203 are bonded to the heat exchange plate 30 through the narrow surfaces of the second shell 204. At this time, the installation setting of the second shells 204 of the multiple second battery cells 203 is more in line with actual working conditions.

[0054] Of course, if Figure 1-Figure 3As shown, one of the first beam 100 and the second beam 200 is an extruded beam, and the other of the first beam 100 and the second beam 200 is a bent beam. To ensure the verticality of the first beam 100 and the second beam 200, one of the first beam 100 and the second beam 200 is an extruded beam, and the other of the first beam 100 and the second beam 200 is a bent beam. That is, when the first beam 100 is an extruded beam, the second beam 200 is a bent beam, or when the first beam 100 is a bent beam, the second beam 200 is an extruded beam. It should be noted that the bent beam can be made of steel plates through a rolling process, and the extruded beam can be formed by extrusion molding (for example, using aluminum alloy) or pultrusion molding (for example, using resin and composite material substrates). The structural stability of the extruded beam is better than that of the bent beam. The bent beam usually needs to be welded after bending, and the bent beam is deformed during the welding process. The first beam 100 and the second beam 200 adopt structures with different structural stabilities to ensure the verticality after being connected into a whole.

[0055] The electric device according to the embodiment of the present invention includes: the battery pack 1 described in the above embodiment.

[0056] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0057] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0058] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose 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 (1), characterized in that: include: A first battery module (10), the first battery module (10) comprising: a first crossbeam (100); A second battery module (20), the second battery module (20) and the first battery module (10) are stacked in a first direction, the second battery module (20) comprising: a second crossbeam (200), the second crossbeam (200) and the first crossbeam (100) are arranged opposite to and fixed to each other in the first direction; A heat exchange plate (30) is provided between the first battery module (10) and the second battery module (20); a groove (303) is provided on a side of the heat exchange plate (30) facing the second battery module (20); and the second crossbeam (200) is provided with a support portion (202), and the support portion (202) is supported in the groove (303).

2. The battery pack (1) according to claim 1, characterized in that The heat exchange plate (30) comprises: a main board (301) and a flow channel plate (302); the main board (301) is arranged between the first battery module (10) and the second battery module (20); the flow channel plate (302) is arranged on a side of the main board (301) facing the second battery module (20); and the flow channel plate (302) is provided with the groove (303).

3. The battery pack (1) according to claim 2, characterized in that: There are a plurality of support portions (202), the plurality of support portions (202) are spaced apart, an avoidance groove (201) is defined between two adjacent support portions (202), and the avoidance groove (201) is arranged opposite to a side of the flow channel plate (302) facing the second battery module (20).

4. The battery pack (1) according to claim 3, characterized in that The flow channel plate (302) is provided with a flow channel portion (300) extending toward the second crossbeam (200), and the flow channel portion (300) extends into the avoidance groove (201).

5. The battery pack (1) according to claim 1, characterized in that: It also includes: a water inlet (40) and a water outlet (50), the water inlet (40) and the water outlet (50) being respectively communicated with the heat exchange plate (30), and the water inlet (40) and the water outlet (50) being integrated at one end of the heat exchange plate (30) in the second direction; or The water inlet member (40) and the water outlet member (50) are respectively arranged at two ends of the heat exchange plate (30) in a second direction, and the second direction is perpendicular to the first direction.

6. The battery pack (1) according to claim 1, characterized in that Also includes: A connecting member (60) is provided, wherein the connecting member (60) passes through the second crossbeam (200) to the inside of the first crossbeam (100) along a first direction, and the connecting member (60) is fixed inside the first crossbeam (100).

7. The battery pack (1) according to claim 6, characterized in that: A connecting portion (101) is provided in the first crossbeam (100), and the connecting member (60) is fixed to the connecting portion (101).

8. The battery pack (1) according to any one of claims 1 to 7, characterized in that: A first positioning portion is provided on the side of the first beam (100) facing the second beam (200), and a second positioning portion is provided on the side of the second beam (200) facing the first beam (100), and the first positioning portion is positioned and matched with the second positioning portion.

9. The battery pack (1) according to claim 8, characterized in that: One of the first positioning portion and the second positioning portion is a positioning column, and the other of the first positioning portion and the second positioning portion is a positioning groove.

10. The battery pack (1) according to claim 1, characterized in that: The first battery module (10) further comprises: a plurality of first battery cells (102), the plurality of first battery cells (102) being arranged in sequence in a second direction, and the first crossbeam (100) being provided at least at both ends of the plurality of first battery cells (102) in the second direction; The second battery module (20) further comprises: a plurality of second battery cells (203), the plurality of second battery cells (203) being arranged in sequence in a second direction, and the second crossbeam (200) being arranged at least at both ends of the plurality of second battery cells (203) in the second direction.

11. The battery pack (1) according to claim 10, characterized in that: Also includes: An insulating member is provided at least on a side of the first crossbeam (100) adjacent to the first battery core (102), and at least on a side of the second crossbeam (200) adjacent to the second battery core (203).

12. The battery pack (1) according to claim 11, characterized in that: The insulating member is a plastic member or a composite material member.

13. The battery pack (1) according to claim 10, characterized in that: Also includes: A heat insulating member is provided at least on a side of the first crossbeam (100) adjacent to the first battery core (102), and at least on a side of the second crossbeam (200) adjacent to the second battery core (203).

14. The battery pack (1) according to claim 10, characterized in that: Also includes: A tray (70), a plurality of the first battery cells (102) are bonded to the tray (70), and a plurality of the second battery cells (203) are bonded to the heat exchange plate (30).

15. The battery pack (1) according to claim 14, characterized in that: The first crossbeam (100) and the tray (70) are connected via fasteners; or The first crossbeam (100) and the tray (70) are bonded together; or The first crossbeam (100) is connected to the tray (70) by welding.

16. The battery pack (1) according to claim 14, characterized in that The first battery cell (102) comprises: a first shell (103), wherein the large surfaces of the first shells (103) of the plurality of first battery cells (102) are arranged opposite to each other, and the narrow surfaces of the first shells (103) of the plurality of first battery cells (102) are all bonded to the tray (70); The second battery cell (203) comprises a second shell (204), wherein the large surfaces of the second shells (204) of the plurality of second battery cells (203) are arranged opposite to each other, and the narrow surfaces of the second shells (204) of the plurality of second battery cells (203) are all bonded to the heat exchange plate (30).

17. The battery pack (1) according to claim 1, characterized in that One of the first beam (100) and the second beam (200) is an extruded beam, and the other of the first beam (100) and the second beam (200) is a bent beam.

18. An electrical device, characterized in that: include: The battery pack (1) according to any one of claims 1 to 17.

Images