Battery pack and electric device

Abstract

The utility model discloses a battery pack and an electric device, and belongs to the field of power batteries. The battery pack comprises a box body which is provided with an accommodating cavity; the first expansion beam is arranged in the accommodating cavity and divides the box body into a first space and a second space; the first expansion beam is provided with a first avoiding groove; the plurality of batteries are arranged in the first space at intervals; the liquid cooling plates are arranged in the first space at intervals; the first cooling pipeline comprises a first pipeline and a connector connected with the first pipeline, and the first pipeline is arranged in the first space and connected with the side, close to the first expansion beam, of the liquid cooling plate; a part of the joint is arranged in the first avoiding groove in a penetrating manner; and the reinforcing plate is connected with the first expansion beam and covers and seals the first avoiding groove. The first space can be compatible with the battery, the first cooling pipeline and other structures at the same time, and the structural space utilization rate of the side cooling mode is increased; and a reinforcing plate covers the first avoiding groove, so that the strength of the first expansion beam at the first avoiding groove is ensured, and the expansion limiting effect on the battery is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery pack and a power utilization device. BACKGROUND

[0002] In a vehicle power battery pack, various cooling forms for different positions of an electrode assembly, such as a large face, a side face and a top face, have appeared. In the cooling structure for the large face or the side face of the electrode assembly, the inlet and outlet water pipes of a liquid cooling plate are arranged on one side of the electrode assembly, so that an expansion beam in the battery pack needs to be avoided at the position of the inlet and outlet water pipes, which leads to a decrease in the overall strength of the expansion beam, and is not conducive to the limitation of the vibration of the whole battery pack and the expansion of the electrode assembly. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to provide a battery pack and a power utilization device to meet the need of avoiding the inlet and outlet water pipes by the expansion beam, while ensuring that the expansion beam has a certain strength.

[0004] TECHNICAL SCHEME: A battery pack in an embodiment of the application comprises:

[0005] A box body having a containing cavity, the box body having a first direction X, a second direction Y and a third direction Z intersecting with each other;

[0006] A first expansion beam arranged in the containing cavity and separating the box body into a first space and a second space in the first direction X, the first expansion beam having a first avoidance groove communicating the first space and the second space;

[0007] A plurality of batteries arranged in the first space at intervals;

[0008] A plurality of liquid cooling plates arranged in the first space at intervals along the second direction Y, the batteries being arranged between adjacent liquid cooling plates, and the liquid cooling plates being connected with the batteries;

[0009] A first cooling pipeline comprising a first pipeline and a joint connected with the first pipeline, the first pipeline being arranged in the first space and connected with one side of the liquid cooling plate close to the first expansion beam, and part of the joint being arranged in the first avoidance groove and facing the second space;

[0010] A reinforcing plate connected with the first expansion beam and covering the slot opening of the first avoidance groove along the third direction Z.

[0011] In some embodiments, the battery pack further comprises:

[0012] A first expansion plate is arranged in the first space X; the first expansion plate is connected with the first expansion beam and is arranged towards the battery; the first expansion plate is used to abut against the battery when the battery expands;

[0013] The first expansion plate and the first expansion beam have a first accommodating groove extending along the second direction Y, and the first pipeline is arranged in the first accommodating groove.

[0014] In some embodiments, the first expansion beam comprises a first connecting portion and a plurality of first protruding portions connected with the first connecting portion; the first protruding portions are arranged on a side of the first connecting portion facing the battery, and the first protruding portions are arranged at intervals along the second direction Y; a first gap is arranged between adjacent first protruding portions and / or between the first protruding portions and the inner wall of the box body; and the liquid cooling plate arranged at one end of the first expansion beam is arranged in the first gap.

[0015] The first expansion plate comprises a second connecting portion and a first extending portion connected with the second connecting portion; the second connecting portion is connected with the first connecting portion, the first extending portion is partially located between the first protruding portion and the battery, and the first extending portion, the first protruding portion, the second connecting portion and the part of the first connecting portion jointly enclose the first accommodating groove.

[0016] In some embodiments, the reinforcing plate comprises:

[0017] A first plate body connected with the first expansion beam;

[0018] At least one reinforcing rib connected with the first plate body; the reinforcing rib is arranged on a side of the first plate body away from the first expansion beam and extends along the third direction Z.

[0019] In some embodiments, the reinforcing plate further comprises:

[0020] A plurality of protrusions arranged on a side of the first plate body away from the first expansion beam; the protrusions are arranged at intervals along the second direction Y, the reinforcing rib is arranged between adjacent protrusions, and the protrusions are connected with the reinforcing rib.

[0021] The protrusions have a second through hole penetrating along the third direction Z.

[0022] In some embodiments, the battery pack further comprises:

[0023] A fixing plate arranged in the second space and connected with the first expansion beam;

[0024] An electrical module is arranged in the second space and connected to the fixing plate on a side away from the first expansion beam.

[0025] In some embodiments, the fixing plate comprises:

[0026] A second plate body connected to the first expansion beam, and a second avoiding slot between the first plate body and the first expansion beam, and a part of the second plate body arranged in the second avoiding slot;

[0027] A bending section connected to an end of the second plate body away from the first expansion beam and extending along the third direction Z;

[0028] A third plate body connected to an end of the bending section away from the second plate body and extending along the first direction X, and the third plate body connected to the electrical module.

[0029] In some embodiments, the third plate body has a third avoiding slot penetrating the third plate body along the third direction Z, and the third avoiding slot in communication with the second space.

[0030] In some embodiments, the second plate body has a third through hole penetrating along the third direction Z, and the first plate body has a plurality of first through holes penetrating along the third direction Z, and the first through holes correspondingly arranged with the third through hole.

[0031] The third plate body further has a fourth through hole penetrating along the third direction Z, and the fourth through hole arranged with the third avoiding slot.

[0032] In some embodiments, the application further provides a power consumption device comprising the battery pack for supplying power to the power consumption device.

[0033] Beneficial effects: the battery pack of the embodiment of the application comprises: a box body having a receiving cavity, the box body has a first direction X, a second direction Y and a third direction Z intersecting with each other; a first expansion beam arranged in the receiving cavity and separating the box body in the first direction X into a first space and a second space; the first expansion beam has a first avoiding groove communicating the first space and the second space; a plurality of batteries arranged in the first space at intervals; a plurality of liquid cooling plates arranged in the first space at intervals along the second direction Y; a battery arranged between adjacent liquid cooling plates, and the liquid cooling plate is connected with the battery; a first cooling pipeline comprising a first pipeline and a joint connected with the first pipeline, the first pipeline being arranged in the first space and connected with one side of the liquid cooling plate close to the first expansion beam; part of the joint is arranged in the first avoiding groove and is arranged towards the second space; a reinforcing plate connected with the first expansion beam and covering the slot of the first avoiding groove along the third direction Z. In the battery pack of the application, the first pipeline is arranged in the first space and the first avoiding groove for avoiding the joint is arranged on the first expansion beam, so that the first space can simultaneously accommodate the battery and the first cooling pipeline and other structures, thereby increasing the space utilization rate of the structure of the side cooling cooling mode; and the reinforcing plate is covered on the first avoiding groove, thereby ensuring the strength of the first expansion beam at the first avoiding groove, so as to satisfy the expansion limiting effect on the battery.

[0034] In the battery pack of the application, the reinforcing plate comprises a first plate body and at least one reinforcing rib, the reinforcing rib is connected with the first plate body, and the reinforcing rib is arranged on the side of the first plate body away from the first expansion beam and extends along the third direction Z. By arranging the reinforcing rib, the stress condition of the first expansion beam in the third direction Z can be further improved, so as to improve the structural strength of the first expansion beam. The reinforcing plate further comprises a plurality of protrusions arranged on the side of the first plate body away from the first expansion beam, the plurality of protrusions are arranged at intervals along the second direction Y, a reinforcing rib is arranged between adjacent protrusions, and the protrusion is connected with the reinforcing rib; the protrusion has a second through hole penetrating along the third direction Z. By arranging the protrusion and the second through hole, a wire harness with a tie is fixed, so as to improve the space utilization rate.

[0035] In the battery pack of the application, the battery pack further comprises a fixing plate arranged in the second space and connected with the first expansion beam; and an electrical module arranged in the second space and connected to the side of the fixing plate away from the first expansion beam. By arranging the fixing plate, the problem of interference between the electrical module and the reinforcing plate caused by directly mounting the electrical module on the first expansion beam is avoided, and at the same time, enough space is ensured between the electrical module and the first expansion beam to satisfy the wiring of the wire harness connector, thereby ensuring the stability of the connection between the electrical module and the battery.

[0036] The power consumption device of the embodiment of the application can comprise all the technical features and beneficial effects of the above-mentioned battery pack, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0038] Figure 1 The battery pack structure schematic diagram provided by the present application;

[0039] Figure 2 The box structure schematic diagram provided by the present application;

[0040] Figure 3 The liquid cooling plate arrangement schematic diagram provided by the present application;

[0041] Figure 4 The first cooling pipeline arrangement schematic diagram provided by the present application;

[0042] Figure 5 The first cooling pipeline structure schematic diagram provided by the present application;

[0043] Figure 6 The first expansion beam, reinforcing plate and fixing plate connection schematic diagram provided by the present application;

[0044] Figure 7 The reinforcing plate structure schematic diagram provided by the present application;

[0045] Figure 8 The reinforcing plate provided with a second avoiding slot schematic diagram provided by the present application;

[0046] Figure 9 The first expansion beam and reinforcing plate connection local schematic diagram provided by the present application;

[0047] Figure 10 The fixing plate structure schematic diagram provided by the present application;

[0048] Figure 11 The first expansion beam structure schematic diagram provided by the present application;

[0049] Figure 12 The first expansion plate structure schematic diagram provided by the present application;

[0050] Figure 13 The first expansion beam and first expansion plate surrounding to form a first containing slot schematic diagram provided by the present application;

[0051] Label: 1 - box, 10 - containing cavity, 101 - first space, 102 - second space, 103 - first containing groove, 2 - first expansion beam, 20 - first avoiding groove, 21 - first connecting part, 22 - first protruding part, 23 - first notch, 3 - battery, 4 - liquid cooling plate, 5 - first cooling pipeline, 6 - reinforcing plate, 61 - first plate body, 611 - second avoiding groove, 612 - first through hole, 62 - reinforcing rib, 63 - protrusion, 631 - second through hole, 7 - first expansion plate, 71 - second connecting part, 72 - first extending part, 8 - fixed plate, 81 - second plate body, 811 - third through hole, 82 - bending section, 83 - third plate body, 831 - third avoiding groove, 832 - fourth through hole, 9 - electrical module. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, at least one refers to one, two or more, unless otherwise explicitly specified.

[0054] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The embodiment provides a battery pack, which comprises a box body 1, a first expansion beam 2, a plurality of batteries 3, a plurality of liquid cooling plates 4, a first cooling pipeline 5 and a reinforcing plate 6; the box body 1 has a containing cavity 10, and the box body 1 has a first direction X, a second direction Y and a third direction Z which intersect with each other; the first expansion beam 2 is arranged in the containing cavity 10 and divides the box body 1 into a first space 101 and a second space 102 in the first direction X; the first expansion beam 2 has a first avoiding groove 20 which communicates the first space 101 and the second space 102; the plurality of batteries 3 are arranged in the first space 101 at intervals; the plurality of liquid cooling plates 4 are arranged in the first space 101 at intervals along the second direction Y; the batteries 3 are arranged between adjacent liquid cooling plates 4, and the liquid cooling plates 4 are connected with the batteries 3; the first cooling pipeline 5 comprises a first pipeline 51 and a joint 52 connected with the first pipeline 51, the first pipeline 51 is arranged in the first space 101 and connected with one side of the liquid cooling plate 4 close to the first expansion beam 2; part of the joint 52 is arranged through the first avoiding groove 20 and arranged towards the second space 102; the reinforcing plate 6 is connected with the first expansion beam 2 and covers the slot of the first avoiding groove 20 along the third direction Z.

[0055] It can be understood that, in the battery pack, the first expansion beam 2 is arranged in the box body 1 and connected with the side wall of the box body 1 arranged at intervals along the second direction Y, the box body 1 can be divided into the first space 101 and the second space 102, the first expansion beam 2 is made of metal material and can bear part of the expansion force generated after the expansion of the battery 3; the first space 101 is used for containing the battery 3 and provides the energy storage function of the battery; the second space 102 is used for containing the electrical module 9 such as a battery management system (BMS), a battery energy distribution unit (BDU) and other battery monitoring and protection circuits, and is responsible for monitoring, controlling and protecting the battery pack to run in a safe, efficient and stable state. The first avoiding groove 20 is arranged on the first expansion beam 2 and used for placing the joint 52 of the first cooling pipeline 5, so as to ensure the water inlet and outlet functions of the first cooling pipeline 5 from the joint 52; the first cooling pipeline 5 is located in the first space 101, that is, between the battery 3 and the first expansion beam 2, so that the first space 101 can simultaneously accommodate the battery 3 and the first cooling pipeline 5, and the space utilization rate of the battery pack is improved; in addition, the reinforcing plate 6 is covered on the first avoiding groove 20, so as to ensure the strength of the first expansion beam 2 at the first avoiding groove 20, so as to meet the expansion limiting effect on the battery 3.

[0056] In some embodiments, the first direction X, the second direction Y and the third direction Z are perpendicular to each other. Figure 1 For example, the directions of the first direction X, the second direction Y and the third direction Z in other drawings are all based on the directions of the arrows shown in the figure. Figure 1 The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0057] In some embodiments, referring to Figure 1 ,Figure 3 and Figure 4 The liquid cooling plate 4 is arranged at intervals along the second direction Y and connected with the battery 3, which can cool the side surface of the battery 3, realize effective heat transfer between the liquid cooling plate 4 and the battery 3, and help to keep the temperature of the battery evenly distributed. The first cooling pipeline 5 is used to input cooling medium into the liquid cooling plate 4, so as to ensure the continuous cooling effect of the liquid cooling plate 7.

[0058] In some embodiments, referring to Figure 1 , Figure 3 and Figure 13 The battery pack further comprises: a first expansion plate 7, which is arranged in the first space X; the first expansion plate 7 is connected with the first expansion beam 2 and arranged towards the battery 3; the first expansion plate 7 is used to abut against the battery 3 when the battery 3 expands; the first expansion plate 7 and the first expansion beam 2 have a first accommodating groove 103 extending along the second direction Y, and the first pipeline 51 is arranged in the first accommodating groove 103.

[0059] It can be understood that the first expansion plate 7 is made of metal material, which can transmit and disperse the expansion force. The first expansion plate 7 can buffer the direct effect of the expansion force of the battery on the first expansion beam 2, and reduce the mechanical stress concentration of the uneven expansion force on the first expansion beam 2. Therefore, by arranging the first expansion plate 7, the over-expansion of the battery 3 can be prevented. When the battery 3 expands to contact the first expansion plate 7, the first expansion plate 7 will limit the further expansion of the battery 3 before the first expansion beam 2, thereby protecting the battery 3 and its packaging structure, and further ensuring the safety and reliability of the secondary battery.

[0060] In some embodiments, the first expansion beam 2 can be fixed on the box body 1 in the form of welding, bolt connection, riveting, or gluing. The connection between the first expansion plate 7 and the first expansion beam 2 can be in the form of welding, bolt connection, riveting, or gluing.

[0061] In some embodiments, further referring to Figure 13 The first accommodating groove 103 is located in the first space 101 and used to accommodate the first pipeline 51 of the first cooling pipeline 5. Since the first accommodating groove 103 is in the first space 101, on the one hand, it can serve as an expansion space for the battery 3, and on the other hand, it is also compatible with the water pipeline, which solves the problem of the first pipeline 51 occupying additional space in the battery pack, and increases the utilization rate of the structural space of the battery side cooling mode. At the same time, the first expansion plate 7 can be installed after the battery 3 is put into the box, which avoids the interference problem between the first pipeline 51 and the liquid cooling plate 4 and the box body 1 when the battery 3 is put into the box.

[0062] In some embodiments, the liquid cooling plate 4 is arranged on the first expansion plate 7, as shown in Figure 1The first expansion beam 2 can be arranged on the side of the battery 3, or can be arranged on the large surface of the battery 3 at intervals, and the arrangement of the battery 3 can be changed.

[0063] In some embodiments, referring to Figure 11 and Figure 13 , the first expansion beam 2 includes a first connecting portion 21 and a plurality of first protruding portions 22 connected to the first connecting portion 21, the first protruding portions 22 are arranged on the side of the first connecting portion 21 facing the battery 3, and the plurality of first protruding portions 22 are arranged at intervals along the second direction Y. It can be understood that the first connecting portion 21 serves as a boundary between the first space 101 and the second space 102, and can guide the arrangement of the battery 3; the first connecting portion 21 extends along the second direction Y, and the two sides thereof are connected to the inner wall of the box body 1, and the first connecting portion 21 can also be regarded as a cross beam structure in the battery pack, which can further improve the structural stability of the box body 1. The first protruding portion 22 is located in the first space 101 and is arranged towards the battery 3, and the first protruding portion 22 facilitates the determination of the specific size of the first accommodating groove 103, and can further improve the structural utilization rate in the battery pack.

[0064] In some embodiments, the first protruding portions 22 have first gaps 23 between adjacent first protruding portions 22, and one end of the liquid cooling plate 4 close to the first expansion beam 2 is arranged in the first gap 23; or, the first protruding portions 22 have first gaps 23 between the first protruding portions 22 and the inner wall of the box body 1. The first gap 23 is used to avoid the liquid cooling plate 4 extending to the first expansion beam 2, so as to avoid structural interference between the liquid cooling plate 4 and the first expansion beam 2; and the part of the liquid cooling plate 4 extending out is used to connect with the first cooling pipeline 5, so as to realize the introduction of the cooling medium.

[0065] In some embodiments, the first gaps 23 are arranged between adjacent first protruding portions 22 and between the first protruding portions 22 and the inner wall of the box body 1, and the specific arrangement of the first gaps 23 is subject to the arrangement of the liquid cooling plate 7.

[0066] In some embodiments, referring to Figure 12 and Figure 13 , the first expansion plate 7 includes a second connecting portion 71 and a first extending portion 72 connected to the second connecting portion 71; the second connecting portion 71 is connected to the first connecting portion 21, the first extending portion 72 is located between the first protruding portion 22 and the battery 3, and the first extending portion 72, the first protruding portion 22, the second connecting portion 71 and part of the first connecting portion 21 together enclose the first accommodating groove 103. It can be understood that the second connecting portion 71 is a force bearing structure of the first expansion plate 7, which is used to connect with the first expansion beam 2 to disperse the force of the battery expansion, the first extending portion 72 is used to enclose the first accommodating groove 103, and is used to determine the specific size of the first accommodating groove 103.

[0067] In some embodiments, see further Figure 13 , along the first direction X, there is a gap between the first expansion plate 7 and the battery 3, and this gap is the glue filling area. The glue filling area can connect the first expansion plate 7 and part of the structure of the battery 3. It can be understood that the present application adopts a gap entry method (the box body is installed with a cumulative tolerance to ensure that all components are smoothly placed), that is, the battery will be filled with potting glue after entering the box. After the glue dries, the adhesive force of the glue can provide a certain reaction force to absorb the pre-tightening force generated by the silicone strip / circular frame, etc., so that the internal force reaches a balanced state and will not generate force on the outside world; at the same time, the battery 3 is provided with an insulating sheet on the side facing the first expansion plate 7. The insulating sheet is connected to the large surface of the battery and is used for insulation between the battery 3 shell and the box body or the first expansion plate 7 and other metal parts to prevent the blue film of the battery 3 from being damaged and to isolate the conduction between the damaged blue film area and the metal parts.

[0068] In some embodiments, see Figure 6 and Figure 7 The reinforcing plate 6 includes a first plate body 61 connected to the first expansion beam 2; and at least one reinforcing rib 62 connected to the first plate body 61. The reinforcing rib 62 is disposed on a side of the first plate body 61 away from the first expansion beam 2 and extends along the third direction Z. It is understood that when multiple reinforcing ribs 62 are provided (two or more), the multiple reinforcing ribs 62 are spaced apart in the first direction X. The provision of the reinforcing ribs 62 can further enhance the force-bearing effect of the reinforcing plate 6 in the third direction Z, thereby ensuring the structural stability of the first expansion beam 2.

[0069] In some embodiments, see further Figure 7 The reinforcing plate 6 also includes a plurality of protrusions 63, which are disposed on a side of the first plate 61 away from the first expansion beam 2. The protrusions 63 are spaced apart along the second direction Y, with reinforcing ribs 62 disposed between adjacent protrusions 63 and connected to the ribs. The protrusions 63 have second through-holes 631 extending along the third direction Z. It will be appreciated that the connection between the protrusions 63 and the reinforcing ribs 62 further enhances strength. The second through-holes 631 serve as cable tie holes for securing a wire harness with a cable tie, facilitating unified management of the wire harnesses and improving internal space utilization within the battery pack.

[0070] In some embodiments, see Figure 1 and Figure 6The battery pack further includes a fixing plate 8, which is disposed in the second space 102 and connected to the first expansion beam 2; and an electrical module 9, which is disposed in the second space 102 and connected to a side of the fixing plate 8 away from the first expansion beam 2. It is understood that the fixing plate 8 can serve as a transition connection structure, and the electrical module 9 can be a battery management system (BMS), that is, the battery management system (BMS) is connected to the first expansion beam 2 via the fixing plate 8. The provision of the fixing plate 8 avoids interference with the reinforcing plate 6 when the electrical module 9 is directly mounted on the first expansion beam 2. At the same time, sufficient space is ensured between the electrical module 9 and the first expansion beam 2 to accommodate the routing of the wiring harness connector, thereby ensuring the stability of the connection between the electrical module 9 and the battery 3.

[0071] In some embodiments, see further Figure 8 、 Figure 9 and Figure 10 The fixed plate 8 includes a second plate 81 connected to the first expansion beam 2. A second avoidance groove 611 is defined between the first plate 61 and the first expansion beam 2, with a portion of the second plate 81 extending through the second avoidance groove 611. It is understood that the second avoidance groove 611 is provided to facilitate insertion of the second plate 81 between the first plate 61 and the first expansion beam 2, serving as an area for mounting the fixed plate 8 and the first expansion beam 2.

[0072] In some embodiments, see further Figure 10 The fixed plate 8 includes a bent section 82, which is connected to the end of the second plate 81 away from the first expansion beam 2 and extends along the third direction Z. The bent section 82 further enhances the strength of the fixed plate 8. This is because after bending, the fixed plate 8 forms a curved structure, making the fixed plate 8 more rigid and stable when subjected to stress. In addition, the bent section 82 disperses the external stress applied to the fixed plate 8 over a larger area, reducing localized stress concentration and thereby enhancing the strength of the fixed plate 8.

[0073] In some embodiments, see further Figure 10 The fixing plate 8 includes a third plate body 83 , which is connected to an end of the bending section 82 away from the second plate body 81 and extends along the first direction X; the third plate body 83 is connected to the electrical module 9 .

[0074] In some embodiments, see further Figure 6 and Figure 10 The third plate 83 has a third avoidance groove 831 that penetrates the third plate 83 along the third direction Z and communicates with the second space 102. It is understood that the provision of the third avoidance groove 831 facilitates the passage of structures such as copper busbars, and by providing the third avoidance groove 831 to avoid empty space, the space utilization rate within the battery pack is further improved.

[0075] In some embodiments, referring to Figure 7 and Figure 10 The second plate body 81 has a third through hole 811 extending along the third direction Z; the first plate body 61 has a plurality of first through holes 612 extending along the third direction Z; the first through holes 612 are arranged corresponding to the third through holes 811, so that the second plate body 81 and the first plate body 61 can be connected by connecting members arranged in the first through holes 612 and the third through holes 811. The first through holes 612 and the third through holes 811 can be regarded as shared mounting holes, improving space utilization.

[0076] In some embodiments, referring to Figure 10 The third plate body 83 further has a fourth through hole 832 extending along the third direction Z, and the fourth through hole 832 is arranged spaced apart from the third avoiding groove 831. The fourth through hole 832 serves as a wiring harness strap mounting hole for fixing the wiring harness, reducing the number of components used in the battery pack.

[0077] In some embodiments, the application further provides a power utilization device comprising the battery pack provided in the embodiments. The power utilization device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the application do not specially limit the above power utilization device.

[0078] The battery pack and the power utilization device provided in the embodiments of the application are described in detail above, and the principles and implementation manners of the application are described by using specific examples. The above description of the embodiments is only used to help understand the technical solutions of the application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A battery pack, characterized in that: include: A box body, the box body having a receiving cavity, the box body having a first direction, a second direction and a third direction intersecting in pairs; a first expansion beam, provided in the accommodating cavity, and dividing the box body into a first space and a second space in the first direction; the first expansion beam has a first avoidance groove connecting the first space and the second space; A plurality of batteries are arranged in the first space at intervals; A plurality of liquid cooling plates are spaced apart in the first space along the second direction; the battery is disposed between adjacent liquid cooling plates, and the liquid cooling plates are connected to the battery; a first cooling pipeline, the first cooling pipeline comprising a first pipe and a joint connected to the first pipe, the first pipe being disposed in the first space and connected to a side of the liquid cooling plate close to the first expansion beam; a portion of the joint being passed through the first avoidance groove and disposed toward the second space; A reinforcing plate is connected to the first expansion beam and covers a notch of the first avoidance groove along the third direction.

2. The battery pack according to claim 1, wherein: Also includes: a first expansion plate, the first expansion plate being disposed in the first space; the first expansion plate being connected to the first expansion beam and disposed toward the battery; The first expansion plate is used to abut against the battery when the battery expands; A first accommodating groove extending along the second direction is provided between the first expansion plate and the first expansion beam, and the first pipe is provided in the first accommodating groove.

3. The battery pack according to claim 2, wherein: The first expansion beam includes a first connecting portion and a plurality of first protrusions connected to the first connecting portion, wherein the first protrusions are provided on a side of the first connecting portion facing the battery, and the plurality of first protrusions are spaced apart along the second direction; a first notch is provided between adjacent first protrusions and / or between the first protrusions and the inner wall of the box, and an end of the liquid cooling plate close to the first expansion beam is provided in the first notch; The first expansion plate includes a second connecting portion and a first extension portion connected to the second connecting portion; the second connecting portion is connected to the first connecting portion, the first extension portion is partially located between the first protrusion and the battery, and the first extension portion, the first protrusion, the second connecting portion and a portion of the first connecting portion together enclose the first accommodating groove.

4. The battery pack according to claim 1, wherein: The reinforcing plate comprises: a first plate body connected to the first expansion beam; At least one reinforcing rib is connected to the first plate body, the reinforcing rib is provided on a side of the first plate body away from the first expansion beam and extends along the third direction.

5. The battery pack according to claim 4, characterized in that: The reinforcing plate further comprises: a plurality of protrusions, the plurality of protrusions being provided on a side of the first plate away from the first expansion beam, the plurality of protrusions being spaced apart along the second direction, the reinforcing ribs being provided between adjacent protrusions, and the protrusions being connected to the reinforcing ribs; The protrusion has a second through hole penetrating along the third direction.

6. The battery pack according to claim 4, characterized in that: The battery pack further includes: a fixing plate disposed in the second space and connected to the first expansion beam; An electrical module is disposed in the second space and connected to a side of the fixing plate away from the first expansion beam.

7. The battery pack according to claim 6, characterized in that: The fixing plate comprises: a second plate connected to the first expansion beam; a second avoidance groove is defined between the first plate and the first expansion beam, and a portion of the second plate is disposed in the second avoidance groove; a bent section connected to an end of the second plate away from the first expansion beam and extending along the third direction; The third plate is connected to one end of the bending section away from the second plate and extends along the first direction; the third plate is connected to the electrical module.

8. The battery pack according to claim 7, characterized in that: The third plate body has a third avoidance groove, the third avoidance groove penetrates the third plate body along the third direction, and the third avoidance groove is communicated with the second space.

9. The battery pack according to claim 8, characterized in that: The second plate has a third through hole extending along the third direction; the first plate has a plurality of first through holes extending along the third direction; the first through holes are arranged corresponding to the third through holes; The third plate body further has a fourth through hole penetrating along the third direction, and the fourth through hole is spaced apart from the third avoidance groove.

10. An electrical device, characterized in that: The battery pack comprises the battery pack according to any one of claims 1 to 9, wherein the battery pack is used to supply power to the electrical device.

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