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 box, first battery group, second battery group, first cold plate and fixed structure.Box includes frame, bottom plate and the beam extending along first direction, frame is perpendicular to bottom plate and is enclosed with bottom plate to form internal space, beam separates the internal space of box into first containing bin and second containing bin, first direction is parallel to bottom plate.The first battery group and the second battery group are contained in first containing bin and second containing bin respectively, each battery group includes multiple batteries stacked along second direction, and two are aligned along second direction, second direction is parallel to bottom plate and perpendicular to first direction.The first cold plate extends across beam along second direction, and a part is located on the upside of first battery group and another part is located on the upside of second battery group.Fixed structure is fixedly connected with beam and first cold plate, so as to constrain the deformation of first cold plate in the direction perpendicular to bottom plate.

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 usually equipped with cooling plates, which are thermally connected to the batteries to achieve heat exchange.

[0003] However, in actual operation, battery packs often face various complex conditions such as vibration and impact. If the cold plate is not securely fixed, it will shift or loosen, affecting its connection with the battery. Specifically, when the cold plate is bent and deformed by external force, the contact area between the cold plate and the battery will decrease. This creates a low thermal conductivity medium, namely air, between the cold plate and the battery, ultimately reducing the heat exchange efficiency of the cold plate. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and an electrical device having the same, which aims to improve the installation stability of the cold plate.

[0005] In a first aspect, the battery pack provided by this utility model includes a housing, a first battery pack, a second battery pack, a first cold plate, and a fixing structure. The housing includes a frame, a bottom plate, and a beam extending along a first direction. The frame is perpendicular to the bottom plate and encloses an internal space with the bottom plate. The beam divides the internal space of the housing into a first receiving compartment and a second receiving compartment, with the first direction parallel to the bottom plate. The first battery pack and the second battery pack are respectively housed in the first receiving compartment and the second receiving compartment. Each battery pack includes multiple batteries stacked along a second direction, and the two are aligned along the second direction, which is parallel to the bottom plate and perpendicular to the first direction. The first cold plate extends along the second direction across the beam, with a portion of the first cold plate located above the first battery pack and another portion located above the second battery pack. The fixing structure is fixedly connected to the beam and the first cold plate.

[0006] Secondly, the electrical equipment provided by this utility model includes the battery pack of the first aspect.

[0007] The beneficial effects of the battery pack provided in the above embodiments of this utility model are as follows: The fixed structure securely connects the beam and the first cold plate, enhancing the strength and overall stability of the first cold plate. This constrains the deformation of the first cold plate in the direction perpendicular to the base plate, ensuring a stable contact area between the first cold plate and the battery under adverse conditions such as impact or vibration, thereby guaranteeing the heat exchange efficiency of the first cold plate. In this way, the heat generated by the battery during charging and discharging can be dissipated in a timely manner, thus avoiding the risk of thermal runaway due to localized overheating of the battery pack. Attached Figure Description

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention.

[0013] Figure 2 yes Figure 1 An exploded view of the battery pack.

[0014] Figure 3 yes Figure 1 A schematic diagram of a portion of the battery pack.

[0015] Figure 4 yes Figure 2 A schematic diagram of the battery structure in the battery pack.

[0016] Figure 5 yes Figure 1 A schematic diagram of a portion of the battery pack.

[0017] Figure 6 yes Figure 5 An exploded view of a portion of the battery pack.

[0018] Figure 7 yes Figure 6 A schematic diagram of the support structure.

[0019] Figure 8 yes Figure 3 A schematic diagram of a portion of the battery pack.

[0020] Figure 9yes Figure 1 A cross-sectional view of a portion of the battery pack.

[0021] Figure 10 yes Figure 1 A schematic diagram of a portion of the battery pack.

[0022] Figure 11 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; Housing - 10; Frame - 11; Base plate - 12; Beam - 13; Internal space - 101; First compartment - 102; Second compartment - 103; Battery - 20; Shell - 21; Terminal post - 22; Explosion-proof valve - 23; Cell - 24; First battery pack - 201; Second battery pack - 202; First cold plate - 31; Second cold plate - 32; Third cold plate - 33; Connecting pipe - 70; Fixing structure - 40; Fixed plate-41; Support plate-42; Support plate through hole-421; Support-43; First plate section-431; Second plate section-432; Third plate section-433; Fourth plate section-434; Fifth plate section-435; Sixth plate section-436; Seventh plate section-437; First end plate-501; Second end plate-502; End plate through hole-51; Fastener-52; Conductive busbar-60; First part-61; Insulating sleeve-62; 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 4 A battery 20 is shown, which can store chemical energy and controllably convert chemical energy into electrical energy. In the recyclable battery 20, the active materials can be activated by charging after discharge so that it can continue to be used.

[0026] It is understood that in this embodiment of the present invention, battery 20 refers to an energy storage device that can be repeatedly charged and discharged. Battery 20 can be lithium-ion battery 20, sodium-ion battery 20, nickel-metal hydride battery 20, etc.

[0027] refer to Figure 4 The battery 20 includes a casing 21, a cell 24, and terminals 22.

[0028] The housing 21 provides a receiving space to house the battery cell 24 and isolate it from the outside environment. The housing 21 includes a body with an opening at at least one end and a receiving cavity. The opening of the housing 21 can be closed by a cover plate, sealing and isolating the internal environment of the battery 20 from the external environment. Exemplarily, the housing 21 can be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic, or aluminum-plastic film; this invention does not impose any particular limitation on this material.

[0029] Cell 24 is the component in battery 20 where electrochemical reactions occur, and it is also the smallest unit in battery 20 capable of electrochemical reactions such as charging or discharging. Cell 24 typically includes a positive electrode, a negative electrode, and a separator. As an example, cell 24 can be a lithium-ion cell 24, which operates by the intercalation and deintercalation of lithium ions between the positive and negative electrodes.

[0030] It is understood that the battery cell 24 can be implemented in various ways. For example, the battery cell 24 can be a cylindrical battery cell 24 formed by winding a positive electrode sheet, a separator, and a negative electrode sheet. Alternatively, the battery cell 24 can be a battery cell 24 with a generally cuboid shape formed by winding or stacking a positive electrode sheet, a separator, and a negative electrode sheet. In the current embodiment, the battery cell 24 is cuboid in shape, and the housing 21 is a cuboid-shaped rigid shell to accommodate the battery cell 24.

[0031] The terminals 22 are used to connect to the cell 24 to output or input electrical energy to the battery 20. In the current embodiment, the battery 20 includes two terminals 22, which are respectively connected to the positive and negative terminals of the cell 24.

[0032] Continue to refer to Figure 4 The battery 20 also includes an explosion-proof valve 23, which is actuated when the internal pressure or temperature of the housing 21 reaches a predetermined threshold to release the internal pressure or temperature, so as to reduce the internal pressure of the housing 21 and prevent the battery 20 from deforming or exploding due to excessive pressure increase inside the housing 21.

[0033] It is understood that the present invention does not impose any particular restrictions on the position of the explosion-proof valve 23. For example, the explosion-proof valve 23 can be located at the top of the battery 20 or at the bottom of the battery 20.

[0034] It is understood that this utility model does not impose any special restrictions on the material of the explosion-proof valve 23. For example, the explosion-proof valve 23 can be made of aluminum, steel, or an alloy.

[0035] It is understood that the present invention does not impose any particular restrictions on the shape of the explosion-proof valve 23. For example, the shape of the explosion-proof valve 23 can be one of square, oblong, elliptical and racetrack shape.

[0036] It is understood that this utility model does not impose any particular limitation on the type of explosion-proof valve 23. For example, the explosion-proof valve 23 can be a weakly scored area formed on the wall by laser processing or stamping, and the weakly scored area has a smaller material thickness than the wall. When the internal pressure of the battery 20 exceeds a preset safety threshold, the weakly scored area will rupture first, thereby releasing the internal pressure of the housing 21.

[0037] <Example Battery Pack> refer to Figure 1 and Figure 2 The battery pack 100 provided in this embodiment of the present invention includes a housing 10 and a plurality of batteries 20. The housing 10 includes a frame 11 and a base plate 12. The frame 11 is perpendicular to the base plate 12 and together with the base plate 12 forms an internal space 101. The plurality of batteries 20 can be connected in series or in parallel to form a battery pack. The battery pack is housed in the internal space 101.

[0038] 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. The above components and the battery pack are placed inside the housing 10 and sealed by a cover plate to form a complete functional unit that can directly output electrical energy.

[0039] Battery 20 faces different performance and safety challenges under different temperature environments. For example, at low temperatures, the electrochemical reaction rate inside battery 20 decreases significantly, which can easily lead to capacity decay, increased internal resistance, and decreased power output, and in severe cases, even failure to function properly. At high temperatures or during intense charging and discharging, battery 20 generates a large amount of heat. If heat dissipation is not timely or uneven, it may cause local overheating, resulting in safety hazards such as thermal runaway.

[0040] To ensure that the operating temperature of battery 20 is maintained within a suitable range, refer to Figure 2 The battery pack 100 also includes a cooling plate 30, which is used to dissipate heat from the battery 20 to regulate the temperature of the battery 20.

[0041] As one possible implementation, the cold plate 30 can be constructed as a liquid-cooled plate 30 or a phase-change cold plate 30, and is thermally connected to the battery 20. A refrigerant can be stored within the cold plate 30, and cooling of the battery 20 is achieved through a phase change of the refrigerant.

[0042] 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 20.

[0043] As an example, the cooling plate 30 can be an air-cooled plate 30, located at the bottom of the housing 10, i.e., connected to the bottom of the side wall to form a sealed housing 10 structure. The air-cooled plate 30 can be fixed to the side wall of the housing 10 using nuts or other methods. In order to form an airflow cavity inside the housing 10, the bottom plate 12 is set inside the barrel-shaped structure. Since the bottom of the battery 20 is flat, the bottom plate 12 also needs to be set parallel to the air-cooled plate 30. A gap is left between the air-cooled plate 30 and the bottom plate 12, so that the bottom plate 12, the side wall, and the air-cooled plate 30 together form an airflow cavity.

[0044] As another example, the cooling plate 30 can be a liquid-cooled plate 30, which has liquid cooling channels within it. Optionally, the liquid-cooled plate 30 also includes a liquid inlet and a liquid outlet, both of which are connected to the 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 20 is subjected to compression or impact, which can enable the battery 20 to have higher structural strength and improve safety performance.

[0045] 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.

[0046] When the cold plate 30 is subjected to an external force in the height direction, it will bend and deform, which will reduce the contact area between the cold plate 30 and the battery 20. This will result in a heat transfer medium with a low thermal conductivity, namely air, between the cold plate 30 and the battery 20, thereby reducing the heat exchange efficiency of the cold plate 30.

[0047] To solve the above problems, refer to Figures 2 to 5The battery pack 100 provided in this embodiment includes a first battery pack 201, a second battery pack 202, a first cold plate 31, and a fixing structure 40. The housing 10 includes a beam 13 extending along a first direction, parallel to the bottom plate 12. The beam 13 divides the internal space 101 of the housing 10 into a first receiving compartment 102 and a second receiving compartment 103. The first battery pack 201 and the second battery pack 202 are respectively housed in the first receiving compartment 102 and the second receiving compartment 103. Each battery pack includes multiple batteries 20 stacked along a second direction, and the first battery pack 201 and the second battery pack 202 are aligned along the second direction. The second direction is parallel to the bottom plate 12 and perpendicular to the first direction. The first cold plate 31 extends along the second direction across the beam 13, with a portion of the first cold plate 31 located above the first battery pack 201 and another portion located above the second battery pack 202. The fixing structure 40 is fixedly connected to the beam 13 and the first cold plate 31.

[0048] The fixed structure 40 securely connects the beam 13 and the first cold plate 31, enhancing the strength and overall stability of the first cold plate 31. This constrains the deformation of the first cold plate 31 in the height direction, ensuring a stable contact area between the first cold plate 31 and the battery 20 under adverse conditions such as impact or vibration, thereby ensuring the heat exchange efficiency of the first cold plate 31. In this way, the heat generated by the battery 20 during charging and discharging can be dissipated in a timely manner, thus avoiding the risk of thermal runaway due to localized overheating of the battery pack 100.

[0049] It is understood that in this disclosure, directional descriptions such as "up," "down," and "top" are relative rather than absolute. These directional descriptions apply when the elements in the embodiments of this utility model are in the placement posture and position shown in the figures. It should be noted that in the figures of the embodiments 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; arrows Y+ and Y- can be used to indicate opposite sides in the second direction, and the first direction, the second direction, and the height direction are perpendicular to each other.

[0050] refer to Figure 2The battery pack 100 also includes a second cold plate 32 spaced apart from the first cold plate 31 in a first direction. The second cold plate 32 extends across the beam 13 in a second direction, with a portion located above the first battery pack 201 and another portion located above the second battery pack 202. Both the first cold plate 31 and the second cold plate 32 are fixedly connected to the fixing structure 40. The fixing structure 40 fixedly connects the first cold plate 31 and the second cold plate 32, which can enhance the structural strength of the first cold plate 31 and the second cold plate 32. When either the first cold plate 31 or the second cold plate 32 is subjected to an external force in the height direction and has a tendency to bend and deform, the other and the fixing structure 40 can restrain its bending deformation, thereby ensuring the contact area between the first cold plate 31 and the second cold plate 32 and the battery 20, thereby ensuring the heat exchange efficiency of the first cold plate 31 and the second cold plate 32 and reducing the risk of thermal runaway caused by local overheating of the battery pack 100.

[0051] It should be noted that the upper side of the first battery pack 201 refers to the side of the first battery pack 201 that is away from the bottom plate 12 of the housing 10 in the height direction. Similarly, the upper side of the second battery pack 202 refers to the side of the second battery pack 202 that is away from the bottom plate 12 of the housing 10 in the height direction.

[0052] refer to Figure 5 The fixing structure 40 includes a fixing plate 41, which is located between the first cold plate 31 and the second cold plate 32. The edges of the first cold plate 31 and the second cold plate 32 that are opposite to each other in the first direction are fixedly connected to the opposite edges of the fixing plate 41. According to the battery pack 100 provided in this embodiment, since the fixing plate 41 is fixedly connected to the edges of the first cold plate 31 and the second cold plate 32 in the first direction, when the fixing plate 41 is installed in place, the top surface of the fixing plate 41 does not exceed the top surfaces of the first cold plate 31 and the second cold plate 32. In this way, the fixing plate 41 does not occupy the space above the first cold plate 31 and the second cold plate 32 in the height direction, thereby helping to improve the space utilization efficiency and structural compactness of the battery pack 100.

[0053] As another example, the top surface of the fixing plate 41 refers to the surface of the fixing plate 41 that is away from the bottom plate 12 of the housing 10 in the height direction. The top surfaces of the first cold plate 31 and the second cold plate 32 refer to the surfaces of the first cold plate 31 and the second cold plate 32 that are away from the bottom plate 12 of the housing 10 in the height direction.

[0054] refer to Figure 8Each battery 20 has a terminal post 22 on the side closest to the first cold plate 31 and the second cold plate 32 in the height direction. The first cold plate 31 and the second cold plate 32 cover the battery terminal post 22. As a component for outputting or inputting electrical energy from the battery 20, the terminal post 22 generates a large amount of heat due to high current carrying capacity during the charging and discharging process of the battery 20. If heat dissipation is not timely or uneven, it can easily lead to local overheating, thereby causing thermal runaway. To solve the above problems, the battery pack 100 provided in this embodiment of the present invention has the first cold plate 31 and the second cold plate 32 covering the terminal post 22, which can dissipate the heat generated by the terminal post 22 in a timely manner. Therefore, it can effectively reduce the operating temperature of the terminal post 22, prevent the terminal post 22 from overheating, and thus ensure the safety and operational stability of the battery pack 100 during the charging and discharging process.

[0055] Continue to refer to Figure 8 In the current embodiment, there are two pole posts 22, and the explosion-proof valve 23 is located between the two pole posts 22 in the first direction. The first cold plate 31 and the second cold plate 32 do not cover the explosion-proof valve 23. In this way, the first cold plate 31 and the second cold plate 32 can exchange heat with the battery 20, while avoiding blocking the explosion-proof valve 23, thereby ensuring the safety of the battery 20.

[0056] refer to Figure 2 The battery pack 100 includes two first battery packs 201 arranged side-by-side along a first direction and two second battery packs 202 arranged side-by-side along the first direction. The two first battery packs 201 and the two second battery packs 202 are at least partially covered by a second cold plate 32. Compared to an implementation where each battery pack 20 has two cold plates, the implementation where the second battery pack 202 simultaneously covers both the first battery pack 201 and the second battery pack 202 reduces the number of components, improves space utilization efficiency, and enhances structural compactness.

[0057] refer to Figure 2 and Figure 5 The first battery pack 201 and the second battery pack 202 are both fixedly connected to the fixing structure 40. By fixing the first battery pack 201 and the second battery pack 202 to the fixing structure 40, the overall structural rigidity of the battery pack 20 can be improved, enabling it to effectively resist vibration and impact, which helps to improve the safety and stability of the entire battery pack 100.

[0058] refer to Figure 5The first battery pack 201 also includes a first end plate 501 disposed on the side of the second battery pack 202 in the second direction, and the second battery pack 202 also includes a second end plate 502 disposed on the side of the first battery pack 201 in the second direction. Both the first end plate 501 and the second end plate 502 are fixedly connected to the fixing structure 40. According to the embodiment of the present invention, the battery pack 100 provides a first end plate 501 and a second end plate 502 between the first battery pack 201 and the second battery pack 202, and connects the first end plate 501 and the second end plate 502 through the fixing structure 40, which can achieve a stable connection between the first battery pack 201 and the second battery pack 202. In addition, since the main stress points of the connection are independent of the first battery pack 201 and the second battery pack 202, this implementation method can also avoid squeezing, deformation or damage caused by mechanical fixing and constraint directly acting on the first battery pack 201 and the second battery pack 202, thereby improving the structural safety and reliability of the entire battery pack 100.

[0059] refer to Figure 5 and Figure 6 The fixing structure 40 also includes two pairs of fasteners 52, which correspond to the first end plate 501 and the second end plate 502 respectively. Each of the first end plate 501 and the second end plate 502 has two end plate through holes 51, which are spaced apart along a first direction. The corresponding pair of fasteners 52 pass through the two end plate through holes 51 respectively. By having the fasteners 52 pass through the two end plate through holes 51 respectively, both end plates 50 are fixedly connected to the fixing structure 40, which can enhance the connection rigidity and stability and prevent the end plates 50 from shifting or deforming.

[0060] It is understood that fastener 52 can be implemented in various ways, and this utility model does not impose any particular limitation on it. As an example, fastener 52 can be a bolt.

[0061] refer to Figure 5 The bottoms of the first end plate 501 and the second end plate 502 are supported on the beam 13, and the bottom ends of the two fasteners 52 are fixedly connected to the beam 13. Since the bottoms of the end plate 50 are supported on the beam 13, the space occupied by the end plate 50 in the second direction overlaps with the space occupied by the beam 13 in the second direction. This helps to reduce the size of the end plate 50 and the beam 13 in the second direction, and improves the space utilization efficiency and structural compactness of the battery pack 100.

[0062] refer to Figure 5 and Figure 6The fixing structure 40 also includes a support plate 42, which is located above the first end plate 501 and the second end plate 502. The support plate 42 has two pairs of through holes 421, which correspond to the first end plate 501 and the second end plate 502 respectively. Each pair of through holes 421 includes two through holes 421 spaced apart along a first direction. Two fasteners 52 pass through the two through holes 421 respectively, so that the first battery pack 201 and the second battery pack 202 are both fixedly connected to the support plate 42. Through the through holes 421 of the support plate 42, the two fasteners 52 can fix the support plate 42 to the first end plate 501 and the second end plate 502, thereby fixing the first battery pack 201 and the second battery pack 202 to the support plate 42.

[0063] Continue to refer to Figure 5 and Figure 6 The fixing structure 40 also includes a support 43, which is supported on and fixed to the support plate 42. The fixing plate 41 is supported on and fixed to the support 43. According to the battery pack 100 provided in this embodiment of the present invention, the support plate 42 can provide a flat and reliable mounting reference for the fixing plate 41, and the support 43 can transfer and distribute the load borne by the fixing plate 41 to the support plate 42, thereby improving the stability of the fixing structure 40 under vibration or impact conditions.

[0064] refer to Figure 6 and Figure 7 The support 43 includes a first plate portion 431, a second plate portion 432, a third plate portion 433, a fourth plate portion 434, and a fifth plate portion 435 connected sequentially. The first plate portion 431 and the fifth plate portion 435 are parallel to and fixedly connected to the support plate 42. The third plate portion 433 is parallel to and fixedly connected to the fixed plate 41. The second plate portion 432 and the fourth plate portion 434 are perpendicular to the third plate portion 433. The first plate portion 431, the third plate portion 433, and the fifth plate portion 435 are arranged along a first direction. By constructing multiple plates connected sequentially, the stiffness of the support 43 itself can be increased, thereby enhancing its ability to resist deformation in the first direction and ensuring the structural stability of the support 43. Furthermore, by using two plates, namely the first plate portion 431 and the fifth plate portion 435, to be fixedly connected to the support plate 42, the connection strength between the support 43 and the support plate 42 can also be increased. Since beam 13 extends along the first direction, the first plate portion 431, the third plate portion 433 and the fifth plate portion 435 are arranged in the same direction, so the support 43 can obtain a large arrangement space, providing sufficient space for installation operations and facilitating assembly.

[0065] refer to Figure 7The support 43 also includes a sixth plate portion 436 and a seventh plate portion 437, which extend downward from both ends of the third plate portion 433 in the second direction and are perpendicular to the third plate portion 433. By providing the sixth plate portion 436 and the seventh plate portion 437 in the second direction, the stiffness of the support 43 itself can be increased, thereby enhancing its ability to resist deformation in the second direction and ensuring the structural stability of the support 43.

[0066] refer to Figure 3 , Figure 5 and Figure 9 The battery pack 100 also includes a conductive busbar 60, which electrically connects the first battery pack 201 and the second battery pack 202. The conductive busbar 60 includes a first portion 61, the orthographic projection of which along the height direction does not overlap with the orthographic projection of the first battery pack 201 and the second battery pack 202 along the height direction. A fixing plate 41 and a second cold plate 32 press against the first portion 61, which is wrapped by an insulating sleeve 62. By being directly pressed against by the fixing plate 41 and the first cold plate 31, the conductive busbar 60 can effectively enhance its resistance to deformation or displacement. Specifically, when the battery pack 100 is subjected to impact or vibration, the conductive busbar 60 may tend to shift upwards, but the fixing plate 41 and the second cold plate 32 can restrain its displacement, keeping it in the installed position, thereby avoiding connection failure between the first battery pack 201 and the second battery pack 202 due to loose connection. Furthermore, the insulating sleeve 62 covering the first part 61 can prevent the conductive busbar 60 from directly contacting the fixing plate 41 and the second cold plate 32, thus avoiding electrical risks caused by short circuits and improving the electrical safety of the battery pack 100.

[0067] It is understood that the present invention does not impose any particular restrictions on the position of the conductive busbar 60. In the current embodiment, the fixing plate 41 and the second cold plate 32 press against the first part 61; in other embodiments, the first part 61 can be pressed against by the fixing plate 41 and the first cold plate 31.

[0068] refer to Figure 9 The third plate portion 433 is spaced apart from the conductive bus 60 in the first direction, and the minimum distance from the third plate portion 433 to the conductive bus 60 in the first direction is D1 mm, the size of the fixing plate 41 is D2 mm, and 1 / 100 ≤ D1 mm / D2 mm ≤ 4 / 5. For example, D1 mm / D2 mm can be 1 / 100, 1 / 20, 1 / 10, 3 / 20, 1 / 5, 1 / 4, 3 / 10, 2 / 5, 1 / 2, 3 / 5, 13 / 20, 7 / 10, 3 / 4 or 4 / 5.

[0069] If the ratio of the minimum distance from the third plate portion 433 to the conductive bus 60 along the first direction to the dimension of the fixing plate 41 in the first direction is too small, i.e. less than 1 / 100, then the minimum distance from the third plate portion 433 to the conductive bus 60 is small. Under adverse conditions such as installation operation or impact or vibration, the third plate portion 433 and the conductive bus 60 are prone to accidental contact, which may lead to insulation failure and short circuit risk.

[0070] If the ratio of the minimum distance from the third plate portion 433 to the conductive bus 60 along the first direction to the dimension of the fixing plate 41 in the first direction is too large, i.e. greater than 4 / 5, then the minimum distance from the third plate portion 433 to the conductive bus 60 is large. As a result, when the fixing plate 41 is fixed to the third plate portion 433, the distance from the position or area where the fixing plate 41 is fixedly connected to the third plate portion 433 to the edge of the third plate portion 433 is large. This will form a cantilever structure with an excessively long lever arm, which is not conducive to the stability of the fixing plate 41.

[0071] According to the battery pack 100 provided in this embodiment of the present invention, the ratio of the minimum distance from the third plate portion 433 to the conductive busbar 60 along the first direction to the dimension of the fixing plate 41 in the first direction is limited to the above-mentioned numerical range. This can reduce the risk of accidental contact between the third plate portion 433 and the conductive busbar 60, ensuring the insulation of the conductive busbar 60, and also reduce the probability of the fixing plate 41 forming an unfavorable cantilever structure on the third plate portion 433, thereby providing stable fixation for the fixing plate 41.

[0072] As one possible implementation, D1 mm can satisfy: 1 ​​mm ≤ D1 mm ≤ 8 mm. For example, D1 mm can be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm.

[0073] If the minimum distance from the third plate portion 433 to the conductive bus 60 along the first direction is too small, i.e. less than 1 mm, then during installation operations or under adverse working conditions such as impact or vibration, the third plate portion 433 and the conductive bus 60 are prone to accidental contact, which may lead to insulation failure and short circuit risk.

[0074] If the minimum distance from the third plate portion 433 to the conductive bus 60 along the first direction is too large, i.e. greater than 8 mm, then when the fixing plate 41 is fixed to the third plate portion 433, the distance from the position or area where the fixing plate 41 is fixedly connected to the third plate portion 433 to the edge of the third plate portion 433 will be large. This will form a cantilever structure with an excessively long lever arm, which is not conducive to the stability of the fixing plate 41.

[0075] According to the battery pack 100 provided in this embodiment of the present invention, the minimum distance from the third plate portion 433 to the conductive bus 60 along the first direction is limited to the above-mentioned numerical range. This can reduce the risk of accidental contact between the third plate portion 433 and the conductive bus 60, ensuring the insulation of the conductive bus 60, and also reduce the probability of the fixing plate 41 forming an unfavorable cantilever structure on the third plate portion 433, thereby providing stable fixation for the fixing plate 41.

[0076] As one possible implementation, D2 mm can satisfy: 10 mm ≤ D2 mm ≤ 100 mm. For example, D2 mm can be 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 70 mm, 80 mm, 90 mm, 95 mm or 100 mm.

[0077] If the size of the fixing plate 41 in the first direction is too small, i.e. less than 10 mm, the area of ​​the fixing plate 41 used to fix the third plate part 433 is small, which will increase the difficulty of fixing the third plate part 433.

[0078] If the size of the fixing plate 41 in the first direction is too large, i.e. greater than 100 mm, then when the fixing plate 41 is fixed to the third plate part 433, the distance from the position or area where the fixing plate 41 is fixedly connected to the third plate part 433 to the edge of the third plate part 433 will be large. This will form a cantilever structure, and its lever arm will be too long, which is not conducive to the stability of the fixing plate 41.

[0079] According to the battery pack 100 provided in the embodiment of the present utility model, the size of the fixing plate 41 in the first direction is limited to the above-mentioned numerical range, which can provide sufficient space for the operation of fixing the third plate portion 433, thereby reducing the difficulty of operation, and can also reduce the probability of the fixing plate 41 forming an unfavorable cantilever structure on the third plate portion 433, thereby providing stable fixing for the fixing plate 41.

[0080] refer to Figure 2 and Figure 10 The battery pack 100 also includes two third cold plates 33 and a connecting pipe 70 connecting the two third cold plates 33. The two third cold plates 33 are respectively located on the same side of the first battery pack 201 and the second battery pack 202 in the first direction. The connecting pipe 70 is located between the first battery pack 201 and the second battery pack 202 in the second direction to connect the portions of the two third cold plates 33 whose orthogonal projections along the first direction do not overlap with the orthogonal projections of the first battery pack 201 and the second battery pack 202 along the first direction. One end of the connecting pipe 70 near the support plate 42 is fixed to the support plate 42.

[0081] Since the connecting pipe 70 is located between the first battery pack 201 and the second battery pack 202, the space occupied by the connecting pipe 70 in the second direction overlaps with the space occupied by the beam 13 in the second direction. This helps to reduce the dimensions of the connecting pipe 70 and the beam 13 in the second direction, improving the space utilization efficiency and structural compactness of the battery pack 100. Furthermore, fixing the connecting pipe 70 to the support plate 42 can enhance the installation stability of the connecting pipe 70 without adding components.

[0082] <Example Electrical Equipment> refer to Figure 11 This utility model provides an electrical device 200, which includes a battery pack 100.

[0083] By way of example only, electrical equipment 200 can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, construction vehicles, etc.

[0084] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0085] In a non-restrictive example, refer to Figure 11 The electrical equipment 200 can be an electric vehicle 200, and the battery pack 100 can be used as a power source to provide power to the electric vehicle 200.

[0086] 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".

[0087] 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 plate portion and the second plate portion), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0088] 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: The box (10) includes a frame (11), a bottom plate (12) and a beam (13) extending along a first direction. The frame (11) is perpendicular to the bottom plate (12) and encloses the bottom plate (12) to form an internal space (101). The beam (13) divides the internal space (101) of the box (10) into a first storage compartment (102) and a second storage compartment (103). The first direction is parallel to the bottom plate (12). The first battery pack (201) and the second battery pack (202) are respectively housed in the first housing compartment (102) and the second housing compartment (103). Each battery pack includes a plurality of batteries (20) stacked along a second direction and aligned along the second direction, which is parallel to the base plate (12) and perpendicular to the first direction. The first cold plate (31) extends across the beam (13) in the second direction, with a portion located above the first battery pack (201) and another portion located above the second battery pack (202). as well as The fixed structure (40) is fixedly connected to the beam (13) and the first cold plate (31).

2. The battery pack (100) according to claim 1, characterized in that, It also includes a second cold plate (32) spaced apart from the first cold plate (31) in the first direction. The second cold plate (32) extends across the beam (13) in the second direction, with a portion located above the first battery pack (201) and another portion located above the second battery pack (202). Both the first cold plate (31) and the second cold plate (32) are fixedly connected to the fixing structure (40).

3. The battery pack (100) according to claim 2, characterized in that, The fixing structure (40) includes a fixing plate (41) located between the first cold plate (31) and the second cold plate (32), and the edges of the first cold plate (31) and the second cold plate (32) that are opposite to each other in the first direction are fixedly connected to the opposite edges of the fixing plate (41).

4. The battery pack (100) according to claim 3, characterized in that, Each battery (20) has a terminal post (22) on the side of the height direction near the first cold plate (31) and the second cold plate (32), the first cold plate (31) and the second cold plate (32) covering the terminal post (22), and the first direction, the second direction and the height direction are perpendicular to each other.

5. The battery pack (100) according to claim 4, characterized in that, The number of the poles (22) is two, and each battery (20) also includes an explosion-proof valve (23) located between the two poles (22) in the first direction, wherein the first cold plate (31) and the second cold plate (32) do not cover the explosion-proof valve (23).

6. The battery pack (100) according to claim 2, characterized in that, It includes two first battery packs (201) arranged side by side along the first direction and two second battery packs (202) arranged side by side along the first direction, the two first battery packs (201) and the two second battery packs (202) being at least partially covered by the second cold plate (32).

7. The battery pack (100) according to claim 1, characterized in that, Both the first battery pack (201) and the second battery pack (202) are fixedly connected to the fixed structure (40).

8. The battery pack (100) according to claim 7, characterized in that, The first battery pack (201) further includes a first end plate (501) disposed on the side of the second battery pack (202) in the second direction, and the second battery pack (202) further includes a second end plate (502) disposed on the side of the first battery pack (201) in the second direction, and both the first end plate (501) and the second end plate (502) are fixedly connected to the fixing structure (40).

9. The battery pack (100) according to claim 8, characterized in that, The fixing structure (40) further includes two pairs of fasteners (52), which correspond to the first end plate (501) and the second end plate (502) respectively. Each of the first end plate (501) and the second end plate (502) is provided with two end plate through holes (51) that are arranged through the height direction. The two end plate through holes (51) are spaced apart along the first direction. The corresponding pair of fasteners (52) pass through the two end plate through holes (51) respectively. The bottom of the first end plate (501) and the second end plate (502) are supported on the beam (13). The bottom ends of the two fasteners (52) are fixedly connected to the beam (13). The first direction, the second direction and the height direction are perpendicular to each other.

10. The battery pack (100) according to claim 9, characterized in that, The fixing structure (40) further includes a support plate (42), which is located on the upper side of the first end plate (501) and the second end plate (502). The support plate (42) is provided with two pairs of support plate through holes (421), which correspond to the first end plate (501) and the second end plate (502) respectively. Each pair of support plate through holes (421) includes two support plate through holes (421) spaced apart along the first direction. Two corresponding fasteners (52) pass through the two support plate through holes (421) respectively, so that the first battery pack (201) and the second battery pack (202) are both fixedly connected to the support plate (42).

11. The battery pack (100) according to claim 10, characterized in that, It also includes a second cold plate (32) spaced apart from the first cold plate (31) in the first direction. The second cold plate (32) extends across the beam (13) in the second direction, with a portion located above the first battery pack (201) and another portion located above the second battery pack (202). Both the first cold plate (31) and the second cold plate (32) are fixedly connected to the fixing structure (40). The fixing structure (40) also includes a fixing plate (41) and a support (43). The fixing plate (41) is located between the first cold plate (31) and the second cold plate (32). The edges of the first cold plate (31) and the second cold plate (32) that are opposite to each other in the first direction are fixedly connected to the opposite edges of the fixing plate (41). The support (43) is supported on the support plate (42) and fixed to the support plate (42). The fixing plate (41) is supported on the support (43) and fixed to the support (43).

12. The battery pack (100) according to claim 11, characterized in that, The support (43) includes a first plate (431), a second plate (432), a third plate (433), a fourth plate (434), and a fifth plate (435) connected in sequence. The first plate (431) and the fifth plate (435) are parallel to and fixedly connected to the support plate (42). The third plate (433) is parallel to and fixedly connected to the fixing plate (41). The second plate (432) and the fourth plate (434) are perpendicular to the third plate (433). The first plate (431), the third plate (433), and the fifth plate (435) are arranged along the first direction.

13. The battery pack (100) according to claim 12, characterized in that, The support (43) further includes a sixth plate (436) and a seventh plate (437), which extend downward from both ends of the third plate (433) in the second direction and are perpendicular to the third plate (433).

14. The battery pack (100) according to claim 12, characterized in that, It also includes a conductive bus (60) that electrically connects the first battery pack (201) and the second battery pack (202). The conductive bus (60) includes a first part (61). The orthographic projection of the first part (61) along the height direction does not overlap with the orthographic projections of the first battery pack (201) and the second battery pack (202) along the height direction. The fixing plate (41) and the first cold plate (31) or the second cold plate (32) press against the first part (61). The first part (61) is wrapped by an insulating sleeve (62).

15. The battery pack (100) according to claim 14, characterized in that, The third plate (433) is spaced apart from the conductive bus (60) in the first direction, and in the first direction, the minimum distance from the third plate (433) to the conductive bus (60) is D1 mm, the size of the fixing plate (41) is D2 mm, 1 / 100≤D1 mm / D2 mm≤4 / 5, and / or, 1 mm≤D1 mm≤8 mm, 10 mm≤D2 mm≤100 mm.

16. The battery pack (100) according to claim 14, characterized in that, It also includes two third cold plates (33) and a connecting pipe (70). The two third cold plates (33) are located on the same side of the first battery pack (201) and the second battery pack (202) in the first direction. The connecting pipe (70) is located between the first battery pack (201) and the second battery pack (202) in the second direction to connect the portions of the two third cold plates (33) whose orthographic projections along the first direction do not overlap with the orthographic projections of the first battery pack (201) and the second battery pack (202) along the first direction. One end of the connecting pipe (70) near the support plate (42) is fixed to the support plate (42).

17. An electrical appliance (200), characterized in that, The battery pack (100) includes any one of claims 1 to 16.

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