Battery pack and electric device with same

Abstract

The utility model relates to battery technology field provides a kind of battery pack and the electric equipment with it.The battery pack includes multiple batteries, box, heat exchange part and positioning structure.Box receives multiple batteries.Heat exchange part is located at the bottom of multiple batteries and supports multiple batteries and includes plate body and extension, plate body has the first edge and the second edge opposite in the first direction, extension is stretched out from the first edge along the first direction and has the third edge and the fourth edge opposite in the second direction, the first direction, the second direction and height direction are perpendicular pairwise.Positioning structure includes first positioning part, second positioning part, third positioning part and fourth positioning part, first positioning part and second positioning part are respectively with the first edge and the second edge contact, to position heat exchange part in the first direction, third positioning part and fourth positioning part are respectively with the third edge and the fourth edge contact and realize to position heat exchange part, thereby reduce component quantity and installation step, reduce manufacturing cost.

Description

Technical Field

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

[0002] With the rapid development of new energy vehicles, energy storage systems, and other fields, batteries have gained widespread application due to their advantages such as high energy density and long cycle life. To ensure that batteries always operate within a suitable temperature range, battery packs are typically equipped with thermal management components such as heat exchangers, which are placed at the bottom of the battery to achieve efficient heat exchange.

[0003] When battery packs are used for ship power supply, they face a complex operating environment. Vibrations and shocks caused by wave impacts and ship maneuvers during navigation place higher demands on the stability of the battery pack's internal structure. If the heat exchange components are not securely fixed and become displaced or loose, it will not only affect their contact with the bottom of the battery and reduce heat exchange efficiency, but may also lead to damage to the heat exchange components or even leakage of the heat exchange medium due to long-term wear.

[0004] In related technologies, additional clamping plates or fasteners, such as bolts, are typically used to secure the heat exchange components. This increases the number of components and the overall weight of the battery pack, while also complicating the installation process and increasing manufacturing costs. Furthermore, the complex fixing structure occupies a significant amount of space, which is detrimental to improving the system energy density of the battery pack. Utility Model Content

[0005] In view of this, the present invention provides a battery pack and an electrical device having the same, which aims to reduce the number of components in the battery pack and simplify the installation steps while ensuring the installation stability of the heat exchange components.

[0006] The battery pack provided by this utility model includes multiple batteries, a housing, a cold plate, and a positioning structure. The housing houses multiple batteries. The cold plate is disposed at the bottom of the multiple batteries and supports them, and includes a plate body and a protruding portion. The plate body has a first edge and a second edge opposite each other in a first direction, extending from the first edge. The protruding portion has a third edge and a fourth edge opposite each other in a second direction. The first direction, the second direction, and the height direction are perpendicular to each other. The positioning structure includes a first positioning part, a second positioning part, a third positioning part, and a fourth positioning part. The first positioning part and the second positioning part respectively contact the first edge and the second edge to position the cold plate in the first direction. The third positioning part and the fourth positioning part respectively contact the third edge and the fourth edge to position the cold plate in the second direction.

[0007] Secondly, the electrical equipment provided by this utility model includes the battery pack of the first aspect.

[0008] The beneficial effects of the battery pack provided in the above embodiments of this utility model are as follows: By positioning the heat exchanger in the first and second directions using a positioning structure, displacement of the heat exchanger under adverse operating conditions such as vibration can be prevented, thereby ensuring the installation stability and heat exchange performance of the heat exchanger. Furthermore, since the positioning structure is formed within the housing, this method eliminates the need for additional positioning components, reducing the number of components and simplifying the installation process, which helps to lower manufacturing costs. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0010] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0011] It should also be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0012] It should also be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0013] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention.

[0014] Figure 2 yes Figure 1 An exploded view of the battery pack.

[0015] Figure 3 yes Figure 1 A schematic diagram of a portion of the battery pack.

[0016] Figure 4 yes Figure 1 A schematic diagram of a portion of the battery pack.

[0017] Figure 5 yes Figure 4 An exploded view of a portion of the battery pack.

[0018] Figure 6 yes Figure 4 An exploded view of a portion of the battery pack.

[0019] Figure 7 yes Figure 4 A schematic diagram of a portion of the battery pack.

[0020] Figure 8 yes Figure 7 A cross-sectional view of a portion of the battery pack.

[0021] Figure 9 This is a schematic diagram of the structure of a battery pack according to a variation of the present invention.

[0022] Figure 10 This is a structural schematic diagram of an electrical device according to an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached drawings: Battery pack - 100; Battery - 10; Box body - 20; First bottom beam - 21; Notch - 211; Beam body - 212; First part - 2121; Second part - 2122; Third part - 2123; Folded edge - 213; Second bottom beam - 22; Bottom guard plate - 23; Cold plate - 30; Plate body - 31; First edge - 311; Second edge - 312; Fifth edge - 313; Sixth edge - 314; Protrusion - 32; Liquid inlet port - 321; Liquid outlet port - 322; Third edge - 323; Fourth edge - 324; Positioning structure - 40; First positioning part - 41; Second positioning part - 42; Third positioning part - 43; Fourth positioning part - 44; Fifth positioning part - 45; Positioning post - 50; Fastener - 60; Electrical equipment - 200. Detailed Implementation

[0024] The embodiments of the present invention will now be described by way of example with reference to the accompanying drawings. It should be understood that there are many ways to implement the present invention, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and clear understanding of the present invention.

[0025] <Example Battery> Figure 2 A battery 10 is shown. The battery 10 stores chemical energy and controllably converts this chemical energy into electrical energy. In a recyclable battery, the active materials can be reactivated by charging after discharge, allowing for continued use. The battery 10 stores chemical energy and controllably converts this chemical energy into electrical energy. In a recyclable battery 10, the active materials can be reactivated by charging after discharge, allowing for continued use.

[0026] It is understood that in this embodiment of the present invention, battery 10 refers to an energy storage device that can be repeatedly charged and discharged. Battery 10 can be lithium-ion battery 10, sodium-ion battery 10, nickel-metal hydride battery 10, etc.

[0027] It is understood that the shape of the battery 10 is not particularly limited in this embodiment of the invention; the battery 10 may be cylindrical, flat, cuboid, or other shapes. (See reference) Figure 2 In the current embodiment, the battery 10 is a square battery 10. It can be understood that in other embodiments of the present invention, the battery 10 can also be implemented as a cylindrical battery 10 and a pouch battery 10.

[0028] <Example Battery Pack> refer to Figure 1 and Figure 2 The battery pack 100 provided in this embodiment of the present invention includes a plurality of batteries 10 and a housing 20 for storing the plurality of batteries 10. The plurality of batteries 10 can be connected in series or in parallel to form a battery pack.

[0029] refer to Figure 1 and Figure 2 The battery pack 100 is shown. The battery pack 100 also includes a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. These components and the battery pack are housed within a casing 20 and sealed by a cover plate, forming a complete functional unit capable of directly outputting electrical energy. Exemplarily, the casing 20 can be divided into upper and lower parts, which are sealed together.

[0030] In some embodiments, the battery pack 100 further includes a separator plate. Both the battery pack and the separator plate are located in the housing 20. The separator plate is located on the side of the battery pack away from the bottom wall of the housing 20, separating the battery pack from other devices located above the battery pack, thus serving as an isolation device.

[0031] Battery 10 faces different performance and safety challenges under different temperature environments. For example, at low temperatures, the electrochemical reaction rate inside Battery 10 decreases significantly, which can easily lead to capacity decay, increased internal resistance, and reduced power output, and in severe cases, even failure to function properly. At high temperatures or during intense charging and discharging, Battery 10 generates a large amount of heat. If heat dissipation is not timely or uneven, it may cause local overheating, leading to safety hazards such as thermal runaway.

[0032] To ensure that the operating temperature of battery 10 is maintained within a suitable range, refer to Figure 2 The battery pack 100 also includes a heat exchanger 30, which is used to dissipate heat from the battery 10 to regulate the temperature of the battery 10.

[0033] As one possible implementation, the heat exchanger 30 can be a cold plate 30, which can be constructed as a liquid-cooled plate or a phase-change cold plate, and is thermally connected to the battery 10. A refrigerant can be stored inside the cold plate 30, and cooling of the battery 10 is achieved through the phase change of the refrigerant.

[0034] It is understandable that the refrigerant can be gas, solid, or liquid. Liquid refrigerants can also contain liquids with high specific heat capacity, such as water, as coolants to achieve liquid cooling of the battery 10.

[0035] As an example, the heat exchanger 30 can be an air-cooled plate, located at the bottom of the housing 20, i.e., connected to the bottom of the side wall to form a sealed housing 20 structure. The air-cooled plate can be fixed to the side wall of the housing 20 using nuts or other methods. In order to form an airflow cavity inside the housing 20, the bottom plate is set inside the barrel-shaped structure. Since the bottom of the battery is flat, the bottom plate also needs to be set parallel to the air-cooled plate, with a gap between the air-cooled plate and the bottom plate, so that the bottom plate, side wall, and air-cooled plate together form an airflow cavity.

[0036] As another example, the heat exchanger 30 can be a liquid-cooled plate 30, which has liquid-cooled flow channels. Optionally, the liquid-cooled plate also includes an inlet and an outlet, both of which are connected to a current collector for the inlet and outlet of the heat exchange medium. The liquid-cooled plate 30 can be made of a material with a certain hardness and strength (such as stainless steel), so that the liquid-cooled plate 30 is not easily deformed when the battery 10 is subjected to compression or impact, which can enable the battery 10 to have higher structural strength and improve safety performance.

[0037] It is understandable that the shape of the liquid cooling channel can be various, such as "U", "U-shaped", or "S" shaped. It is understandable that the liquid cooling plate 30 can be made of various materials, such as copper, iron, aluminum, stainless steel, or aluminum alloy. The liquid cooling plate 30 can also be made of nylon, plastic, etc.

[0038] In the current embodiment, reference Figures 2 to 5 The battery pack 100 includes a positioning structure 40. A heat exchanger 30 is disposed at the bottom of and supports multiple batteries 10, and includes a plate 31 and a protrusion 32. The plate 31 has a first edge 311 and a second edge 312 opposite each other in a first direction, extending from the first edge 311. The protrusion 32 has a third edge 323 and a fourth edge 324 opposite each other in a second direction. The positioning structure 40 includes a first positioning part 41, a second positioning part 42, a third positioning part 43, and a fourth positioning part 44. The first positioning part 41 and the second positioning part 42 respectively contact the first edge 311 and the second edge 312 to position the heat exchanger 30 in the first direction. The third positioning part 43 and the fourth positioning part 44 respectively contact the third edge 323 and the fourth edge 324 to position the heat exchanger 30 in the second direction. By positioning the heat exchanger 30 in the first and second directions using the positioning structure 40, displacement of the heat exchanger 30 under adverse operating conditions such as vibration can be avoided, thereby ensuring the installation stability and heat exchange performance of the heat exchanger 30. Furthermore, since the positioning structure 40 is formed in the housing 20, this implementation method does not require additional positioning components, which not only reduces the number of components but also simplifies the installation steps and helps to reduce manufacturing costs.

[0039] It should be noted that in the accompanying drawings of this utility model, arrows Z+ and Z- can be used to indicate opposite sides in the height direction, arrows X+ and X- can be used to indicate opposite sides in the first direction, and arrows Y+ and Y- can be used to indicate opposite sides in the second direction. The height direction, the first direction, and the second direction are perpendicular to each other.

[0040] refer to Figure 4 The protrusion 32 is provided with an inlet port 321 or an outlet port 322. In this way, the inlet port 321 or the outlet port 322 can extend out of the plate 31 to connect with external equipment, realizing the circulation of the heat exchange medium in the heat exchange element 30. This implementation can optimize the spatial layout of the protrusion 32 and the inlet port 321 or the outlet port 322, improving space utilization and layout compactness.

[0041] As one possible implementation, refer to Figure 5 The dimension of the protrusion 32 in the first direction is L mm, where 30 mm ≤ L mm ≤ 80 mm. For example, L mm can be 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 80 mm.

[0042] When the size of the protrusion 32 in the first direction is less than 30 mm, the arrangement space of the liquid inlet port 321 or the liquid outlet port 322 is limited, resulting in a smaller size of the liquid inlet port 321 or the liquid outlet port 322, a smaller flow rate of the heat exchange medium, and a lower heat exchange efficiency.

[0043] When the dimension of the protrusion 32 in the first direction is greater than 80 mm, the dimension of the heat exchanger 30 in the first direction is large, which is not conducive to the space utilization and volumetric energy density of the battery pack.

[0044] According to the battery pack provided in the embodiment of the present utility model, the size of the protrusion 32 in the first direction is limited to the above-mentioned numerical range. This ensures that the liquid inlet port 321 or the liquid outlet port 322 can obtain sufficient arrangement space, thereby ensuring the heat exchange efficiency of the heat exchanger 30, while not excessively increasing the size of the heat exchanger 30 in the first direction, which is beneficial to the space utilization and volumetric energy density of the battery pack.

[0045] Continue to refer to Figure 4The heat exchanger 30 includes two protrusions 32, one of which has a liquid inlet port 321 and the other has a liquid outlet port 322. One protrusion 32 is positioned by a third positioning part 43 and a fourth positioning part 44, and the other protrusion 32 is positioned by another third positioning part 43 and another fourth positioning part 44. According to the battery pack 100 provided in this embodiment of the present invention, the third positioning part 43 and the fourth positioning part 44 position the two protrusions 32 of the heat exchanger 30, which can enhance the constraint effect of the positioning structure 40 on the heat exchanger 30 as a whole in the second direction and effectively suppress its displacement risk under vibration conditions.

[0046] refer to Figure 3 and Figure 4 The housing 20 includes a first bottom beam 21, at least a portion of which constitutes a first positioning part 41. Constructing the first positioning part 41 as the first bottom beam 21 of the housing 20 not only reduces the number of independent components of the battery pack 100 and simplifies the overall structure of the housing 20, but also fully utilizes the strength and rigidity of the first bottom beam 21 as a load-bearing component, significantly improving the positioning stability of the heat exchanger 30 and the reliability of the overall structure.

[0047] refer to Figure 5 The first bottom beam 21 has a notch 211 through which the protruding part 32 extends and is positioned. By providing the notch 211 on the first bottom beam 21, a passage path can be provided for the heat exchanger 30. In addition, the notch 211 is used to limit the heat exchanger 30 on two sides in the second direction, preventing it from making large displacements. This not only enhances the rigidity and reliability of the constraint, but also helps to make the internal space of the battery pack 100 more compact and improves the space utilization rate.

[0048] refer to Figure 3 and Figure 4 The plate 31 has a fifth edge 313 and a sixth edge 314 opposite each other in a second direction, and the protrusion 32 is spaced apart from either the fifth edge 313 or the sixth edge 314 in a second direction.

[0049] Since the structural strength of the edge of the heat exchanger 30 is relatively weak, when the protrusion 32 is too close to the fifth edge 313 or the sixth edge 314 in the second direction, the processing difficulty of the protrusion 32 will increase. In addition, since the positional distribution of the liquid inlet port 321 or the liquid outlet port 322 will determine the uniformity of the heat exchanger 30, when the liquid inlet port 321 or the liquid outlet port 322 is too close to the fifth edge 313 or the sixth edge 314 in the second direction, the flow field of the cooling medium will have uneven distribution gaps 211. This will cause the area of ​​the heat exchanger 30 close to the fifth edge 313 or the sixth edge 314 to be over-cooled, while the area between the fifth edge 313 and the sixth edge 314 will be under-cooled, thereby affecting the uniformity of heat exchange.

[0050] The battery pack 100 provided in this embodiment of the present invention achieves a balance between processing feasibility and heat exchange performance by spacing the protrusion 32 between it and either the fifth edge 313 or the sixth edge 314 in the second direction. This achieves a balance between processing feasibility and heat exchange performance without excessively increasing the processing difficulty of the protrusion 32, while promoting the uniform distribution of the cooling medium in the flow channel. This ensures that the heat exchanger 30 provides a uniform and stable heat exchange effect along the second direction, improves the temperature uniformity of the battery pack 100, and thus ensures the thermal management effect of the battery pack 100.

[0051] refer to Figure 5 and Figure 6 The battery pack 100 also includes two positioning posts 50, which are located in the notch 211 and spaced apart along the second direction. The protrusion 32 is located between the two positioning posts 50. The two positioning posts 50 contact the third edge 323 and the fourth edge 324 respectively, forming the third positioning part 43 and the fourth positioning part 44. By having the two positioning posts 50 contact the third edge 323 and the fourth edge 324 respectively, the degree of freedom of the heat exchanger 30 in the second direction can be effectively constrained, preventing it from undergoing large displacement in the second direction. In addition, compared with planar positioning, the point contact between the two positioning posts 50 and the third edge 323 and the fourth edge 324 provides greater adaptability to the dimensional tolerances of the protrusion 32, thus reducing the difficulty of installation.

[0052] refer to Figure 4The box body 20 also includes a bottom protective plate 23, and the first bottom beam 21 includes a beam body 212 and a flange 213, with the flange 213 parallel to the bottom protective plate 23 and located at the bottom of the beam body 212. The beam body 212 and flange 213 constructed on the first bottom beam 21 can decompose and transfer loads, evenly distributing locally concentrated stresses to the first bottom beam 21, thereby improving the stiffness and deformation resistance of the first bottom beam 21 and ensuring its structural stability. Furthermore, the flange 213 provides a larger contact area for the connection between the first bottom beam 21 and the bottom protective plate 23, thus improving the strength of the connection and ensuring the structural integrity of the box body 20.

[0053] As an example, in the current embodiment, the beam 212 includes a first part 2121, a second part 2122 and a third part 2123 connected in sequence, the second part 2122 being parallel to the bottom guard plate 23, and the first part 2121 and the third part 2123 being perpendicular to the second part 2122.

[0054] refer to Figure 5 The notch 211 is located on the beam 212, and the folded edge 213 is fixed to the bottom protective plate 23 and supports the heat exchanger 30. According to the battery pack 100 provided in this embodiment, the notch 211 is located on the beam 212 of the first bottom beam 21, rather than on its folded edge 213. Therefore, the integrity of the folded edge 213 can be avoided, thus reducing the overall rigidity and deformation resistance of the first bottom beam 21. Furthermore, the folded edge 213 is fixedly connected to the bottom protective plate 23 and jointly supports the heat exchanger 30, helping to distribute the local load from the heat exchanger 30 more evenly over a larger area, thereby enhancing the integrity of the overall structure of the housing 20 and the reliability of its load-bearing capacity.

[0055] Continue to refer to Figure 5 The first bottom beam 21 includes two flanges 213, which are located on opposite sides of the first beam body 212 in the first direction. By fixing the two flanges 213 to the bottom protective plate 23, the contact area between the first bottom beam 21 and the bottom protective plate 23 can be increased, thereby enhancing the connection strength and reliability of the first bottom beam 21 and the bottom protective plate 23. Furthermore, compared to a single flange 213, two flanges 213 can bear more load on the heat exchanger 30. When the flanges 213 and the bottom protective plate 23 work together, the load from the heat exchanger 30 can be evenly distributed over a larger area along both sides of the first direction, thereby enhancing the integrity and load-bearing reliability of the overall structure of the housing 20.

[0056] refer to Figure 5 and Figure 6Two folded edges 213 are spaced apart along a first direction, and two positioning posts 50 are fixed to the bottom protective plate 23. The two folded edges 213 are spaced apart along the first direction, such that a notch 211 on the beam 212 penetrates the beam 212 in the height direction. Thus, the two positioning posts 50 located in the notch 211 can connect to the bottom protective plate 23 through the gap between the two folded edges 213, thereby fixing the two positioning posts 50 to the bottom protective plate 23. This implementation fully utilizes the space formed by the notch 211, achieving reliable installation of the positioning posts 50 without adding additional components. This improves the space utilization efficiency and structural compactness inside the battery pack 100, and ensures the stability of the positioning post 50 installation.

[0057] refer to Figure 3 and Figure 4 The housing 20 also includes a second bottom beam 22 opposite to the first bottom beam 21 in a first direction, and at least a portion of the second bottom beam 22 constitutes a second positioning part 42. Constructing the second positioning part 42 as the second bottom beam 22 of the housing 20 reduces the number of independent components of the battery pack 100, simplifies the overall structure of the housing 20, and fully utilizes the strength and rigidity of the second bottom beam 22 as a load-bearing component, significantly improving the positioning stability of the heat exchanger 30 and the reliability of the overall structure.

[0058] refer to Figures 5 to 7 The battery pack 100 also includes a fifth positioning part 45, which presses against the upper side of the protrusion 32. According to the embodiment of the present invention, the battery pack 100 forms a rigidity limit through the fifth limiting part, thereby constraining the degree of freedom of the protrusion 32 in the height direction, suppressing the risk of displacement of the protrusion 32 under vibration conditions, and thus ensuring the installation stability and heat exchange performance of the heat exchange component 30.

[0059] refer to Figure 7 The fifth positioning part 45 is located in the gap 211. This implementation method can utilize the space where the gap 211 is located to arrange the fifth limiting part, taking into account both positioning function and space utilization.

[0060] Continue to refer to Figure 7 The top surface of the fifth positioning part 45 is lower than the top surface of the first bottom beam 21. According to the battery pack 100 provided in this embodiment of the present invention, the fifth limiting part does not occupy space other than the notch 211 in the height direction, which is beneficial to the space utilization and layout compactness of the box 20.

[0061] Continue to refer to Figure 7The fifth positioning part 45 does not protrude beyond the corresponding side of the first bottom beam 21 on any side in the first direction. According to the battery pack 100 provided in this embodiment of the present invention, the fifth limiting part does not occupy space other than the notch 211 in the first direction, which is beneficial to the space utilization and layout compactness of the box 20.

[0062] Continue to refer to Figure 7 The fifth positioning part 45 has two opposing sides in the second direction that contact the two sides of the notch 211 in the second direction. The notch 211 is used to limit the fifth limiting part in the second direction, thereby restricting the degree of freedom of the fifth limiting part in the second direction and preventing it from displacing too much. This can enhance the rigidity and reliability of the constraint, prevent it from displacing under adverse working conditions such as vibration, and ensure that the fifth limiting part always remains in the installation position.

[0063] refer to Figures 5 to 8 The battery pack 100 also includes a fastener 60, which secures the fifth positioning part 45 to the positioning post 50. By securing the fifth positioning part 45 to the positioning post 50 with the fastener 60, the displacement of the fifth positioning part 45 in the height direction can be limited, ensuring the installation stability of the fifth positioning part 45.

[0064] It should be understood that there are multiple ways to implement the battery pack 100, and it should not be interpreted as being limited to the embodiments described above. The following, in conjunction with... Figure 9 The following are illustrative examples of variations of this utility model. It should be noted that the foregoing embodiments and the following variations share some common elements. In the following variations, these elements will use the same reference numerals as in the foregoing embodiments to omit repeated descriptions.

[0065] refer to Figure 9 In the battery pack 100a provided in the modified embodiment of this utility model, the notch 211a has two opposite sides in the second direction. The two sides contact the third edge 323 and the fourth edge 324 respectively, and the two sides constitute the third positioning part 43a and the fourth positioning part 44a respectively. By having the third edge 323 and the fourth edge 324 of the protrusion 32 contact the two sides of the notch 211a, the degree of freedom of the heat exchanger 30 in the second direction can be effectively constrained, preventing it from displaced under adverse working conditions such as vibration, and ensuring that the heat exchanger 30 remains in the installation position during working vibration. Since the protrusion 32 is completely located in the notch 211a when passing through it, this implementation not only makes full use of the space formed by the notch 211a, which is beneficial to the compactness and space utilization of the internal space of the battery pack 100, but also limits the size of the notch 211a in the second direction to be slightly larger than the size of the protrusion 32 in the second direction, thereby reducing the weakening of the rigidity of the first bottom beam 21a and ensuring the structural strength of the housing 20.

[0066] <Example Electrical Equipment> refer to Figure 10 This utility model provides an electrical device 200, which includes a battery pack 100.

[0067] By way of example only, electrical equipment 200 can be, but is not limited to, ships, vehicles, aircraft, household appliances, and industrial equipment. For example, ships can be container ships, inland waterway transport vessels, sightseeing boats, yachts, etc.

[0068] In a non-restrictive example, refer to Figure 10 The electrical equipment 200 can power the sightseeing boat 200, and the battery pack 100 can be used as a power source for the sightseeing boat 200.

[0069] It should be understood that the term "comprising" and its variations used in this utility model are open-ended, meaning "including but not limited to". The term "according to" means "at least in part according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0070] It should be understood that although terms such as "first" or "second" may be used in this invention to describe various elements (such as the first bottom beam and the second bottom beam), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0071] The scope of protection of this utility model is not limited to the above embodiments. Any variations or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A battery pack (100), characterized in that, include: Multiple batteries (10); The housing (20) houses the plurality of batteries (10); A heat exchanger (30) is disposed at the bottom of the plurality of batteries (10) and supports the plurality of batteries (10). The heat exchanger (30) includes a plate (31) and a protrusion (32). The plate (31) has a first edge (311) and a second edge (312) opposite each other in a first direction. The protrusion (32) extends from the first edge (311) along the first direction. The protrusion (32) has a third edge (323) and a fourth edge (324) opposite each other in a second direction. The first direction, the second direction and the height direction are perpendicular to each other. as well as The positioning structure (40) includes a first positioning part (41), a second positioning part (42), a third positioning part (43), and a fourth positioning part (44). The first positioning part (41) and the second positioning part (42) respectively contact the first edge (311) and the second edge (312) to position the heat exchanger (30) in the first direction. The third positioning part (43) and the fourth positioning part (44) respectively contact the third edge (323) and the fourth edge (324) to position the heat exchanger (30) in the second direction.

2. The battery pack (100) according to claim 1, characterized in that, The protrusion (32) is provided with an inlet port (321) or an outlet port (322), and the dimension of the protrusion (32) in the first direction is L mm, 30 mm ≤ L mm ≤ 80 mm.

3. The battery pack (100) according to claim 2, characterized in that, The heat exchanger (30) includes two protrusions (32), one of which has a liquid inlet port (321) and the other has a liquid outlet port (322). One of the protrusions (32) is positioned by a third positioning part (43) and a fourth positioning part (44), and the other protrusion (32) is positioned by another third positioning part (43) and another fourth positioning part (44).

4. The battery pack (100) according to any one of claims 1 to 3, characterized in that, The housing (20) includes a first bottom beam (21), at least a portion of which constitutes the first positioning part (41).

5. The battery pack (100) according to claim 4, characterized in that, The first bottom beam (21) has a notch (211), and the protrusion (32) extends through the notch (211) to be positioned.

6. The battery pack (100) according to claim 5, characterized in that, The plate (31) has a fifth edge (313) and a sixth edge (314) opposite each other in the second direction, and the protrusion (32) is spaced apart from either the fifth edge (313) or the sixth edge (314) in the second direction.

7. The battery pack (100) according to claim 5, characterized in that, The notch (211) has two opposite sides in the second direction, which respectively contact the third edge (323) and the fourth edge (324), and the two sides respectively constitute the third positioning part (43) and the fourth positioning part (44).

8. The battery pack (100) according to claim 5, characterized in that, It also includes two positioning posts (50), which are located in the notch (211) and spaced apart along the second direction. The protrusion (32) is located between the two positioning posts (50). The two positioning posts (50) contact the third edge (323) and the fourth edge (324) respectively. The two positioning posts (50) respectively constitute the third positioning part (43) and the fourth positioning part (44).

9. The battery pack (100) according to claim 8, characterized in that, The box body (20) also includes a bottom guard plate (23), and the first bottom beam (21) includes a beam body (212) and a folded edge (213), wherein the folded edge (213) is parallel to the bottom guard plate (23) and located at the bottom of the beam body (212).

10. The battery pack (100) according to claim 9, characterized in that, The notch (211) is provided on the beam (212), and the folded edge (213) is fixed to the bottom guard plate (23) and supports the heat exchanger (30).

11. The battery pack (100) according to claim 10, characterized in that, The first bottom beam (21) includes two flanges (213) located on opposite sides of the beam body (212) in the first direction.

12. The battery pack (100) according to claim 11, characterized in that, The two folded edges (213) are spaced apart along the first direction, and the two positioning posts (50) are fixed to the bottom guard plate (23).

13. The battery pack (100) according to claim 4, characterized in that, The housing (20) also includes a second bottom beam (22) that is opposite to the first bottom beam (21) in the first direction, and at least a portion of the second bottom beam (22) constitutes the second positioning part (42).

14. The battery pack (100) according to claim 1, characterized in that, It also includes a fifth positioning part (45), which presses against the upper side of the protrusion (32).

15. The battery pack (100) according to claim 14, characterized in that, The box body (20) includes a first bottom beam (21), the first bottom beam (21) has a notch (211), the protrusion (32) extends through the notch (211) to be positioned, and the fifth positioning part (45) is located in the notch (211).

16. The battery pack (100) according to claim 15, characterized in that, The top surface of the fifth positioning part (45) is lower than the top surface of the first bottom beam (21).

17. The battery pack (100) according to claim 15, characterized in that, The fifth positioning part (45) does not protrude beyond the corresponding side of the first bottom beam (21) on any side in the first direction.

18. The battery pack (100) according to claim 15, characterized in that, The fifth positioning part (45) has two opposite sides in the second direction that contact the two sides of the notch (211) in the second direction.

19. The battery pack (100) according to claim 15, characterized in that, It also includes a positioning post (50) and a fastener (60), the positioning post (50) being located in the notch (211) and spaced along the second direction, and the fastener (60) fixing the fifth positioning part (45) to the positioning post (50).

20. An electrical appliance (200), characterized in that, Includes the battery pack (100) as described in any one of claims 1 to 19.

Images