Battery cluster, energy storage device, energy storage system, power utilization device and charging network

Abstract

The embodiment of the utility model provides a battery cluster, an energy storage device, an energy storage system, a power utilization device and a charging network. The battery cluster comprises a battery assembly, and the battery assembly comprises a plurality of battery layers stacked in the height direction of the battery cluster. Each battery layer comprises a first battery pack and a second battery pack which are arranged along a first direction; each of the first battery pack and the second battery pack comprises a plurality of battery monomers arranged along a second direction, and the first direction and the second direction intersect and are perpendicular to the height direction of the battery cluster. The pole of the battery monomer and the pressure relief structure are respectively positioned at two ends of the battery monomer along the first direction; and the poles of the battery monomers of the first battery pack are opposite to the poles of the battery monomers of the second battery pack. The pressure relief structures of the single batteries of the first battery pack are located on the side, away from the second battery pack, of the first battery pack, and the pressure relief structures of the single batteries of the second battery pack are located on the side, away from the first battery pack, of the second battery pack. And the problem of thermal runaway diffusion is improved while the energy density is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and particularly to a battery cluster, an energy storage device, an energy storage system, an electrical device, and a charging network. Background Art

[0002] With the rapid development of technology, electric energy has become an indispensable energy source in people's production and life. In order to improve the smoothness of electric energy supply and ensure the normal operation of production and life, energy storage devices are required. As a device for cyclically storing and releasing electric energy, the energy storage device stores electric energy in the energy storage device or supplies the electric energy stored in the energy storage device to an electrical device by charging or discharging the energy storage device. Energy storage devices are widely used in fields such as industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations. In the development of energy storage devices, how to improve the energy density of the energy storage device while improving the problem of thermal runaway propagation has become an important research direction in this field. Summary of the Utility Model

[0003] In view of this, embodiments of the present disclosure are expected to provide a battery cluster, an energy storage device, an energy storage system, an electrical device, and a charging network, which can improve the energy density of the energy storage device while improving the problem of thermal runaway propagation.

[0004] To this end, a first aspect of embodiments of the present disclosure provides a battery cluster, the battery cluster includes battery assemblies, the battery assemblies include multiple battery layers stacked along the height direction of the battery cluster, each battery layer includes a first battery group and a second battery group arranged along a first direction, both the first battery group and the second battery group include a plurality of battery cells arranged along a second direction, the first direction intersects with the second direction and is perpendicular to the height direction of the battery cluster;

[0005] Wherein, the pole post of the battery cell and the pressure relief structure of the battery cell are respectively located at two ends of the battery cell along the first direction, and the pole posts of the battery cells in the first battery group are arranged opposite to the pole posts of the battery cells in the second battery group, the pressure relief structures of the battery cells in the first battery group are located on the side of the first battery group away from the second battery group, and the pressure relief structures of the battery cells in the second battery group are located on the side of the second battery group away from the first battery group.

[0006] The battery cluster provided by the embodiment of the present application includes battery modules. On the one hand, by setting the battery modules to include multiple layers of battery layers, each battery layer is stacked along the height direction of the battery cluster, and each battery layer includes a first battery group and a second battery group arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by setting the pressure relief structure of the battery cells in the first battery group on the side of the first battery group facing away from the second battery group, and setting the pressure relief structure of the battery cells in the second battery group on the side of the second battery group facing away from the first battery group. That is to say, the pressure relief structures of the battery cells in the first battery group and the second battery group are respectively arranged on the sides of the first battery group and the second battery group facing away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a thermal runaway occurs in the battery cell, the ejected substances ejected from the pressure relief structure are ejected towards the outside of the battery cluster, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid substances inside the battery cluster, and can minimize the influence of the first battery group and the second battery group on each other during thermal runaway, thereby improving the problem of thermal runaway diffusion. In addition, by arranging the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, the thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway diffusion. In addition, the pole columns of the battery cells in the first battery group and the pole columns of the battery cells in the second battery group are arranged opposite to each other, which is convenient for realizing the rapid connection of high and low voltages between the first battery group and the second battery group. The positions of the high and low voltage connection points between the first battery group and the second battery group are adjacent, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery group and the second battery group, reducing the material consumption of the connecting parts between the first battery group and the second battery group, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0007] In some embodiments, the battery cluster further includes at least one heat exchange member, and the heat exchange member is arranged on at least one side of the battery layer along the height direction of the battery cluster.

[0008] In this embodiment, by arranging the heat exchange member on at least one side of the battery layer along the height direction of the battery cluster, heat exchange can be performed on the battery layer.

[0009] In some embodiments, the interior of the heat exchange member has a medium flow channel for conducting a heat exchange medium, and the heat exchange medium is used for heat exchange with the battery layer.

[0010] It is beneficial to improve the support strength of the battery cluster.

[0011] In some embodiments, the first battery group and the second battery group of the same battery layer share the heat exchange member.

[0012] Here, the first battery pack and the second battery pack of the same-layer battery layer share a heat exchange component. While achieving thermal management of the battery layer, it is also beneficial to improve the support strength of the battery layer, reduce components, and thus improve the assembly efficiency.

[0013] In some embodiments, at least part of the heat exchange component is disposed between adjacent battery layers and is used for heat exchange between adjacent battery layers.

[0014] Here, by disposing at least part of the heat exchange component between adjacent battery layers, the heat exchange component can simultaneously perform heat exchange on the battery layers on opposite sides, which is beneficial to improving the heat exchange efficiency of the heat exchange component for the battery layers. That is to say, while increasing the energy density of the energy storage device, the heat exchange efficiency can also be improved. In addition, by disposing the heat exchange component between adjacent battery layers, it is beneficial to improve the support strength of the battery cluster.

[0015] In some embodiments, the battery cluster further includes an adhesive layer, and the battery layer and the heat exchange component are adhesively connected through the adhesive layer; and / or,

[0016] The battery cluster further includes a heat conductive component, and the heat conductive component is clamped between the battery layer and the heat exchange component.

[0017] Here, the battery layer and the heat exchange component are adhesively connected through the adhesive layer, which can make the battery layer and the heat exchange component have a good heat conduction interface, beneficial to rapid heat exchange between the battery layer and the heat exchange component. While achieving thermal management of the battery layer, the battery layer is adhered to the heat exchange component through the adhesive layer to realize the fixed installation of the battery layer relative to the entire battery cluster. It is beneficial to improve the structural stability of the battery cluster.

[0018] Here, by clamping a heat conductive component between the battery layer and the heat exchange component, it is beneficial to further improve the heat transfer efficiency between the battery layer and the heat exchange component, thereby improving the heat exchange efficiency of the heat exchange component.

[0019] In some embodiments, the heat exchange component is provided with an avoidance groove extending along the second direction.

[0020] Here, by providing an avoidance groove on the heat exchange component, the avoidance groove can avoid components protruding from the battery layer, and is also beneficial to positioning and limiting components protruding from the battery layer, improving the stability of components protruding from the battery layer. On the other hand, it is beneficial to the fitting of the battery layer and the heat exchange component, improving the heat exchange efficiency.

[0021] In some embodiments, the battery cluster further includes at least one connection frame. Each connection frame includes two first connection beams and two second connection beams. The two first connection beams extend along the height direction of the battery cluster, and the two second connection beams extend along the first direction. The first connection beam and the second connection beam are sequentially connected to form the connection frame. The two first connection beams are respectively connected to two sides of the heat exchange member along the first direction, and the two second connection beams are respectively disposed on the top side and the bottom side of the battery cluster.

[0022] Here, by providing the connection frame, the connection frame surrounds the periphery of the battery cluster to connect the battery cluster into a whole, further improving the overall structural stability and structural strength of the battery cluster. In addition, the two first connection beams are respectively connected to two sides of the heat exchange member along the first direction. In this way, the connection frame can bear the weight of the battery layer through the heat exchange member, which is beneficial to reducing the pressure of the upper battery layer on the lower battery layer, that is, the pressure borne by the lower battery layer can be minimized as much as possible, further improving the reliability of the battery cluster, and more battery layers can be provided in the height direction of the battery cluster, improving the energy density of the energy storage device while improving the reliability of the energy storage device.

[0023] In some embodiments, the number of the connection frames is multiple, and the connection frames are arranged at intervals along the second direction.

[0024] Here, by providing multiple connection frames and arranging the connection frames at intervals along the second direction, it is beneficial to improve the overall stability of the battery cluster.

[0025] In some embodiments, the battery assembly further includes at least one strap. The strap is provided on at least one side of the battery layer along the height direction of the battery cluster, and both ends of the strap along the second direction are respectively connected to both ends of the battery layer along the second direction.

[0026] In this way, the battery cells of the first battery group and the second battery group can be pressed tightly to constrain the battery layer in the second direction and improve the stability of the battery layer. In addition, the strap can also be used to bear the expansion force of the battery cells. The expansion force here specifically refers to the force exerted on the strap due to the expansion deformation of the battery cells. As an example, the strap mainly bears the expansion force along the second direction.

[0027] In some embodiments, the battery layer further includes at least one end plate. The first battery group and / or the second battery group are provided with the end plate at at least one end along the second direction, and at least one end of the strap along the second direction is connected to the end plate.

[0028] Here, the battery cell is pressed tightly between the two ends by the tension of the pulling belt, and the pulling belt and the end plate together bear the expansion force of the battery layer. In this way, it is beneficial to improve the structural stability and reliability of the battery cluster.

[0029] In some embodiments, each of the first battery groups includes a plurality of the pulling belts, and at least some of the pulling belts are arranged at intervals along the first direction of the first battery group; and / or,

[0030] Each of the second battery groups includes a plurality of the pulling belts, and at least some of the pulling belts are arranged at intervals along the first direction of the second battery group.

[0031] Here, by arranging a plurality of pulling belts, it is beneficial to improve the ability of the pulling belt to bear the expansion force. In this way, it is beneficial to further improve the structural stability and reliability of the battery cluster.

[0032] In some embodiments, the battery assembly further includes at least one end plate, and the end plate is provided at at least one end of the first battery group and / or the second battery group along the second direction.

[0033] Here, the end plate is used to constrain the battery layer in the first direction and at least bear the expansion force of the battery cell. The expansion force here specifically refers to the acting force applied to the end plate due to the expansion deformation of the battery cell. As an example, the end plate mainly bears the expansion force along the first direction.

[0034] In some embodiments, the battery assembly further includes an insulating member; along the second direction, the insulating member is provided between the battery cell at the end of the first battery group and / or the second battery group and the end plate.

[0035] Here, by designing an insulating member between the end plate and the end battery cell, the insulating member is used to ensure insulation between the battery cell and the end plate, and to a certain extent, it can avoid the problem of short circuit between the outer shell of the battery cell and the end plate after the surface insulation of the battery cell fails.

[0036] In some embodiments, the first battery group includes a first output terminal and a second output terminal respectively located at both ends of the first battery group along the second direction, and both the first output terminal and the second output terminal are located on the side of the first battery group close to the second battery group; the second battery group includes a third output terminal and a fourth output terminal respectively located at both ends of the second battery group along the second direction, and both the third output terminal and the fourth output terminal are located on the side of the second battery group close to the first battery group.

[0037] In some embodiments, the battery assembly includes a connecting member, the first output terminal is electrically connected to the third output terminal through the connecting member, and the second output terminal is electrically connected to the fourth output terminal through the connecting member.

[0038] Here, by arranging both the first output terminal and the second output terminal on the side of the first battery pack close to the second battery pack, and both the third output terminal and the fourth output terminal on the side of the second battery pack close to the first battery pack, that is, arranging the first output terminal, the second output terminal, the third output terminal and the fourth output terminal close to the middle position of the battery layer, the problem of high cost caused by separately insulating and protecting the first battery pack and the second battery pack can be improved. In addition, it is beneficial to shorten the distances between the first output terminal and the third output terminal, and between the second output terminal and the fourth output terminal, which is beneficial to reducing the material consumption of the connecting parts between the first output terminal and the third output terminal, and between the second output terminal and the fourth output terminal, thereby reducing costs. At the same time, the resistance of the connection loop is reduced, and further the internal loss power consumption of the connection loop is reduced.

[0039] In some embodiments, the battery assembly includes an insulating mounting seat disposed on the end plate, and the first output terminal is connected to the insulating mounting seat; and / or,

[0040] the second output terminal is connected to the insulating mounting seat; and / or,

[0041] the third output terminal is connected to the insulating mounting seat; and / or,

[0042] the fourth output terminal is connected to the insulating mounting seat.

[0043] Here, by arranging an insulating mounting seat between the end plate and the first output terminal, the second output terminal, the third output terminal and the fourth output terminal, the insulating mounting seat is used to ensure insulation between the first output terminal, the second output terminal, the third output terminal and the fourth output terminal and the end plate. At the same time, it can also be used to assist the electrical connection between the first output terminal and the third output terminal through a connecting part, and the electrical connection between the second output terminal and the fourth output terminal through a connecting part, that is, it is beneficial to improve the assembly efficiency.

[0044] In some embodiments, the connecting part is located on the side of the end plate away from the battery layer.

[0045] That is to say, the connecting part is located outside the end plate, which is convenient for realizing the assembly of the connecting part and improving the assembly efficiency.

[0046] In some embodiments, the battery cluster further includes at least one battery management system, and the battery management system is disposed on the end plate.

[0047] Here, by arranging the battery management system on the end plate, it is convenient for the electrical connection between the battery management system and the battery layer, and it is beneficial to shorten the connection line between the battery management system and the battery layer. In addition, it is also beneficial to the maintenance and replacement of the battery management system.

[0048] In some embodiments, the battery layer further includes a sampling wire harness extending in the second direction. The sampling wire harness is disposed between the first battery pack and the second battery pack of the same battery layer, and the sampling wire harness is connected to the battery management system.

[0049] The sampling wire harness is used to collect the voltage and temperature of battery cells. The sampling wire harness has a plurality of branches for connecting to the hard aluminum busbars and output terminals between each battery cell.

[0050] A second aspect of the embodiments of the present disclosure provides an energy storage device, including an energy storage bin and the battery cluster described above. The battery cluster is disposed in the energy storage bin.

[0051] The battery cluster of the energy storage device provided by the embodiments of the present application includes battery components. On the one hand, by setting the battery components to include multiple battery layers, the battery layers are stacked along the height direction of the battery cluster, and each battery layer includes a first battery pack and a second battery pack arranged along the first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by setting the pressure relief structure of the battery cells of the first battery pack on the side of the first battery pack facing away from the second battery pack, and setting the pressure relief structure of the battery cells of the second battery pack on the side of the second battery pack facing away from the first battery pack. That is to say, the pressure relief structures of the battery cells of the first battery pack and the second battery pack are respectively arranged on the sides of the first battery pack and the second battery pack facing away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a battery cell undergoes thermal runaway, the ejected substances ejected from the pressure relief structure are ejected towards the outside of the battery cluster, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid substances inside the battery cluster, and can minimize the influence of the first battery pack and the second battery pack on each other during thermal runaway, thereby improving the problem of thermal runaway diffusion. In addition, by arranging the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, the thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway diffusion. In addition, the pole columns of the battery cells of the first battery pack and the pole columns of the battery cells of the second battery pack are arranged opposite to each other, which is convenient for realizing the rapid connection of high and low voltages between the first battery pack and the second battery pack. The high and low voltage connection points of the first battery pack and the second battery pack are adjacent in position, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery pack and the second battery pack, reducing the material consumption of the connecting parts between the first battery pack and the second battery pack, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0052] A third aspect of the embodiments of the present disclosure provides an energy storage system, including a power conversion device and the energy storage device described above. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0053] The battery cluster of the energy storage system provided by the embodiment of the present application includes battery components. On the one hand, by arranging the battery components to include multiple battery layers, each battery layer is stacked along the height direction of the battery cluster, and each battery layer includes a first battery group and a second battery group arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by arranging the pressure relief structure of the battery cells of the first battery group on the side of the first battery group facing away from the second battery group, and arranging the pressure relief structure of the battery cells of the second battery group on the side of the second battery group facing away from the first battery group. That is to say, the pressure relief structures of the battery cells of the first battery group and the second battery group are respectively arranged on the sides of the first battery group and the second battery group facing away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a battery cell undergoes thermal runaway, the ejected matter ejected from the pressure relief structure sprays towards the outside of the battery cluster, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid substances inside the battery cluster, and can minimize the influence of the first battery group and the second battery group on each other during thermal runaway, thereby improving the problem of thermal runaway diffusion. In addition, by arranging the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, the thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway diffusion. In addition, the pole columns of the battery cells of the first battery group and the pole columns of the battery cells of the second battery group are arranged opposite to each other, which is convenient for realizing the rapid connection of high and low voltages between the first battery group and the second battery group. The high and low voltage connection points of the first battery group and the second battery group are adjacent, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery group and the second battery group, reducing the material consumption of the connecting parts between the first battery group and the second battery group, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0054] The fourth aspect of the embodiment of the present disclosure provides an electrical device, including the battery cluster, the energy storage device or the energy storage system described above, and the battery cluster is used to store or provide electric energy.

[0055] The battery cluster of the power consumption device provided by the embodiment of the present application includes battery components. On the one hand, by setting the battery components to include multiple battery layers, each battery layer is stacked along the height direction of the battery cluster, and each battery layer includes a first battery group and a second battery group arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by setting the pressure relief structure of the battery cells of the first battery group on the side of the first battery group facing away from the second battery group, and setting the pressure relief structure of the battery cells of the second battery group on the side of the second battery group facing away from the first battery group. That is to say, the pressure relief structures of the battery cells of the first battery group and the second battery group are respectively arranged on the sides of the first battery group and the second battery group facing away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a battery cell undergoes thermal runaway, the ejected matter ejected from the pressure relief structure sprays towards the outside of the battery cluster, which can improve the problem of short - circuit between different charged bodies caused by the ejected liquid or some solid matter inside the battery cluster, and can minimize the influence of the first battery group and the second battery group on each other during thermal runaway, thereby improving the problem of thermal runaway spread. In addition, by arranging the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway spread. In addition, the pole columns of the battery cells of the first battery group and the pole columns of the battery cells of the second battery group are arranged opposite to each other, which is convenient for realizing the rapid connection of high and low voltages between the first battery group and the second battery group. The positions of the high - and - low - voltage connection points of the first battery group and the second battery group are adjacent, which is beneficial to improving the assembly efficiency, shortening the distance between the high - and - low - voltage connection points of the first battery group and the second battery group, reducing the material consumption of the connecting parts between the first battery group and the second battery group, thereby reducing costs, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0056] The fifth aspect of the embodiment of the present disclosure provides a charging network, including a charging pile and the above - mentioned energy storage device or the above - mentioned energy storage system, and the energy storage device or the energy storage system is used to provide electric energy for the charging pile.

[0057] The battery cluster of the charging network provided by the embodiments of the present application includes battery components. On the one hand, by arranging the battery components to include multiple layers of battery layers, each battery layer is stacked along the height direction of the battery cluster, and each battery layer includes a first battery group and a second battery group arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by arranging the pressure relief structure of the battery cells of the first battery group on the side of the first battery group facing away from the second battery group, and arranging the pressure relief structure of the battery cells of the second battery group on the side of the second battery group facing away from the first battery group, that is to say, the pressure relief structures of the battery cells of the first battery group and the second battery group are respectively arranged on the sides of the first battery group and the second battery group facing away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a battery cell undergoes thermal runaway, the ejected matter ejected from the pressure relief structure sprays towards the outside of the battery cluster, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid matter inside the battery cluster, and can minimize the influence of the first battery group and the second battery group on each other during thermal runaway, thereby improving the problem of thermal runaway diffusion. In addition, by arranging the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, the thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway diffusion. In addition, the pole columns of the battery cells of the first battery group and the pole columns of the battery cells of the second battery group are arranged opposite to each other, which is convenient for realizing the rapid connection of high and low voltages between the first battery group and the second battery group. The positions of the high and low voltage connection points of the first battery group and the second battery group are adjacent, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery group and the second battery group, reducing the material consumption of the connecting parts between the first battery group and the second battery group, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a schematic structural diagram of a charging network provided by some embodiments of the present disclosure;

[0059] Figure 2 is a schematic structural diagram of an energy storage system provided by some embodiments of the present disclosure;

[0060] Figure 3 is a schematic structural diagram of an energy storage device provided by some embodiments of the present disclosure;

[0061] Figure 4 is a schematic structural diagram of a battery cluster provided by some embodiments of the present disclosure;

[0062] Figure 5 is a schematic structural diagram of a battery layer provided by some embodiments of the present disclosure;

[0063] Figure 6 Schematic structural diagram of a battery layer connected to a battery management system provided by some embodiments of the present disclosure;

[0064] Figure 7 Schematic structural diagram of a first battery pack provided by some embodiments of the present disclosure;

[0065] Figure 8 Schematic structural diagram of a second battery pack provided by some embodiments of the present disclosure;

[0066] Figure 9 Schematic structural diagram of a heat exchange member provided by some embodiments of the present disclosure.

[0067] Description of reference numerals

[0068] 1000, charging network; 2000, energy storage system; 100, energy storage device; 10, battery cluster; 11, battery layer; 111, first battery pack; 1111, first output terminal; 1112, second output terminal; 112, second battery pack; 1121, third output terminal; 1122, fourth output terminal; 113, battery cell; 1131, pressure relief structure; 1132, pole; 114, connecting bar; 115, end plate; 116, insulating member; 117, connecting member; 118, insulating mounting seat; 119, sampling wire harness; 12, heat exchange member; 121, avoidance groove; 122, liquid inlet; 123, liquid outlet; 13, pull belt; 14, connecting frame; 141, first connecting beam; 142, second connecting beam; 15, battery management system; 16, insulating plate; 20, energy storage bin; 200, charging pile; 300, power conversion device; 3000, power generation device. Detailed implementation manners

[0069] If there is no special description, all implementation manners and optional implementation manners of the present disclosure can be combined with each other to form a new technical solution.

[0070] If there is no special description, all technical features and optional technical features of the present disclosure can be combined with each other to form a new technical solution.

[0071] With the development of clean energy, more and more devices use electric energy as the driving energy. As a result, power batteries that can store a large amount of electric energy and can be charged and discharged repeatedly have developed rapidly, such as lithium-ion batteries. Among them, power batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as aerospace.

[0072] In the embodiments of the present disclosure, the battery cell may be a secondary battery, which refers to a battery cell that can be activated by charging after discharging so that the active material can be reused.

[0073] The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure do not limit this.

[0074] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting and at the same time allow active ions to pass through.

[0075] The electrode assembly may be a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0076] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0077] In some embodiments, the electrode assembly is a stacked structure.

[0078] As an example, multiple positive electrode sheets and multiple negative electrode sheets may be respectively provided, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0079] As an example, multiple positive electrode sheets may be provided, and the negative electrode sheet is folded to form multiple stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0080] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folding segments.

[0081] As an example, multiple separators may be provided and are respectively disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0082] As an example, the separator may be continuously provided and is disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0083] In some embodiments, the shape of the electrode assembly may be cylindrical, flat, or multi-prismatic, etc.

[0084] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0085] In some embodiments, the battery cell may include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0086] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. There is no particular limitation in the present disclosure.

[0087] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap covers the opening. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0088] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal can be provided on the end cap or on the housing body.

[0089] In some embodiments, the energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0090] In the related art, the pressure relief structures of two adjacent rows of battery cells are arranged inward, and the pressure relief structures of two adjacent rows of battery cells are designed to face each other, with an exhaust passage spaced in the middle. The gas and liquid released by two adjacent rows of battery cells enter the middle exhaust passage. When a thermal runaway exhaust occurs in one row of battery cells, the released gas, liquid, or solid matter will be ejected into the opposite battery pack through the exhaust passage. The high-temperature and high-pressure gas can easily damage the pressure relief structure of the battery cells in the opposite battery pack, and even cause thermal runaway, thus potentially leading to the spread of thermal runaway. In addition, the liquid and metal solid substances may cause the housing of the battery cell to be electrically connected to the middle metal exhaust passage. When the thermal runaway battery cell and the opposite battery cell are simultaneously electrically connected to the exhaust passage, a short-circuit accident will occur. Therefore, in the development of energy storage devices, how to improve the energy density of the energy storage device while improving the problem of thermal runaway spread has become an important research direction in this field.

[0091] In view of this, in order to improve the energy density of the energy storage device while improving the problem of thermal runaway propagation, an embodiment of the present disclosure provides a battery cluster. The battery cluster includes a battery assembly, and the battery assembly includes multiple battery layers stacked along the height direction of the battery cluster. Each battery layer includes a first battery group and a second battery group arranged along a first direction. Both the first battery group and the second battery group include multiple battery cells arranged along a second direction. The first direction intersects the second direction and is perpendicular to the height direction of the battery cluster. Among them, the pole column of the battery cell and the pressure relief structure of the battery cell are respectively located at both ends of the battery cell along the first direction. And the pole columns of the battery cells in the first battery group are arranged opposite to the pole columns of the battery cells in the second battery group. The pressure relief structure of the battery cells in the first battery group is located on the side of the first battery group away from the second battery group, and the pressure relief structure of the battery cells in the second battery group is located on the side of the second battery group away from the first battery group.

[0092] The battery cluster provided by the embodiment of the present disclosure includes a battery assembly. On the one hand, by setting the battery assembly to include multiple battery layers, the battery layers are stacked along the height direction of the battery cluster, and each battery layer includes a first battery group and a second battery group arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device. On the other hand, by setting the pressure relief structure of the battery cells in the first battery group on the side of the first battery group away from the second battery group, and setting the pressure relief structure of the battery cells in the second battery group on the side of the second battery group away from the first battery group. That is to say, the pressure relief structure of the battery cells in the first battery group and the pressure relief structure of the battery cells in the second battery group are respectively arranged on the sides of the first battery group and the second battery group away from each other, that is, the pressure relief structure of the battery cell faces the outside of the battery cluster. In this way, when a battery cell undergoes thermal runaway, the ejected substances ejected from the pressure relief structure are ejected towards the outside of the battery cluster, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid substances inside the battery cluster, and can minimize the influence of the first battery group and the second battery group on each other during thermal runaway, thereby improving the problem of thermal runaway propagation. In addition, by respectively locating the pole column of the battery cell and the pressure relief structure of the battery cell at both ends of the battery cell along the first direction, the thermoelectric separation of the battery layer can be realized, further improving the problem of thermal runaway propagation. In addition, the pole columns of the battery cells in the first battery group are arranged opposite to the pole columns of the battery cells in the second battery group, which is convenient for realizing the rapid connection of high and low voltages between the first battery group and the second battery group. The high and low voltage connection points of the first battery group and the second battery group are adjacent in position, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery group and the second battery group, reducing the material consumption of the connecting parts between the first battery group and the second battery group, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0093] The technical solutions described in the embodiments of the present disclosure are applicable to electrical devices using battery clusters, energy storage devices, or energy storage systems. The electrical device includes a battery cluster, an energy storage device, or an energy storage system according to any embodiment of the present disclosure, and the battery cluster, the energy storage device, or the energy storage system is used to store or provide electrical energy.

[0094] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a stationary or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present disclosure do not impose special restrictions on the above-mentioned electrical devices.

[0095] It should be noted that the technical solutions described in the embodiments of the present disclosure are not only limited to the battery devices described above, but also applicable to all electrical devices including battery devices and energy storage devices.

[0096] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption period and provide electrical energy to relevant users or electrical equipment during the high electricity consumption period. The energy storage system provided by the embodiments of the present disclosure can be any power system that requires an energy storage device.

[0097] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a charging network 1000 provided by an embodiment of the present disclosure. The embodiments of the present disclosure provide a charging network 1000. The charging network 1000 includes a charging pile 200, and the charging pile 200 is used to charge electrical equipment. The charging network 1000 may further include an energy storage device 100 or an energy storage system 2000. The energy storage device 100 or the energy storage system 2000 is electrically connected to the charging pile 200, and the energy storage device 100 or the energy storage system 2000 is used to provide electrical energy to the charging pile 200.

[0098] It should be noted that the charging pile 200 is electrically connected to the energy unit in the energy storage device 100 through a cable, and the energy unit can supply the electric energy stored in itself to the charging pile 200. The charging pile 200 has one or more connectors, which are used to connect to an electrical device (such as a vehicle), so as to supply energy to the electrical device. The charging network 1000 applying the energy storage device 100 can effectively improve the reliability of the charging network 1000 and also help improve the flexibility of the charging network 1000 during deployment.

[0099] The energy storage device 100 can be located inside the charging pile 200 (such as an integrated charging and energy storage device) or outside the charging pile 200.

[0100] In a charging network 1000, there can be one charging pile 200, and the energy storage device 100 supplies electric energy to one charging pile 200; there can also be multiple charging piles 200, and the energy storage device 100 supplies electric energy to multiple charging piles 200.

[0101] As an example, as Figure 1 shown, the charging network 1000 includes one energy storage device 100 and two charging piles 200, and one energy storage device 100 supplies electric energy to the two charging piles 200.

[0102] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of an energy storage system 2000 provided by an embodiment of the present disclosure. An embodiment of the present disclosure provides an energy storage system 2000. The energy storage system 2000 includes a power conversion device 300, and the power conversion device 300 can be electrically connected to a power generation device 3000 and the energy storage device 100 to convert the power provided by the power generation device 3000. The power conversion device 300 converts the electric energy provided by the power generation device 3000 and then imports it into the energy storage device 100 for storage.

[0103] The power conversion device 300 is used to be connected between the power generation device 3000 and the energy storage device 100. The power generation device 3000 is used to generate electric energy, and moreover, the power generation device 3000 is used to store the electric energy it generates into the energy storage device 100 through the power conversion device 300. The energy storage system 2000 applying the energy storage device 100 can effectively improve the operation reliability of the energy storage system 2000. In specific implementation, the power generation equipment can specifically be a solar panel, a hydraulic power generation equipment, a thermal power generation equipment, etc. Among them, the specific type of the power generation equipment is not limited in the present disclosure.

[0104] As an example, as Figure 2As shown in the figure, the energy storage system 2000 includes an energy storage device 100 and a power conversion device 300. Two power generation devices 3000 respectively transmit the generated electric energy to the power conversion device 300, and the power conversion device 300 imports the electric energy into the energy storage device 100 for storage.

[0105] Please refer to Figures 3 to 4 , the energy storage device 100 includes an energy storage bin 20 and a battery cluster 10 of any embodiment of the present disclosure, and the battery cluster 10 is disposed within the energy storage bin 20.

[0106] The energy storage bin 20 can be a cabinet or a container. The interior of the energy storage bin 20 has a cavity, and other components of the energy storage device 100 can also be accommodated within the cavity.

[0107] The number of battery clusters 10 can be one or multiple, and the battery clusters 10 are used to provide or store electric energy.

[0108] Please refer to Figures 4 to 8 , an embodiment of the present disclosure provides a battery cluster 10. The battery cluster 10 includes battery components, and the battery components include multiple battery layers 11 stacked along the height direction of the battery cluster 10. Each battery layer 11 includes a first battery group 111 and a second battery group 112 arranged along a first direction. Both the first battery group 111 and the second battery group 112 include multiple battery cells 113 arranged along a second direction. The first direction intersects with the second direction, and both are perpendicular to the height direction of the battery cluster 10. Among them, the pole column 1132 of the battery cell 113 and the pressure relief structure 1131 of the battery cell 113 are respectively located at both ends of the battery cell 113 along the first direction. And the pole columns 1132 of the battery cells 113 in the first battery group 111 are disposed opposite to the pole columns 1132 of the battery cells 113 in the second battery group 112. The pressure relief structure 1131 of the battery cells 113 in the first battery group 111 is located on the side of the first battery group 111 facing away from the second battery group 112, and the pressure relief structure 1131 of the battery cells 113 in the second battery group 112 is located on the side of the second battery group 112 facing away from the first battery group 111.

[0109] The term "multiple layers" as used in the embodiments of the present application refers to a number of two or more layers. The term "multiple" as used in the embodiments of the present application refers to a number of two or more.

[0110] To meet different power usage requirements, the battery assembly includes multiple battery layers 11. Each battery layer 11 includes a first battery group 111 and a second battery group 112 arranged along a first direction. Both the first battery group 111 and the second battery group 112 include multiple battery cells 113 arranged along a second direction. A battery cell 113 refers to the smallest unit that makes up the battery cluster 10. Multiple battery cells 113 can be connected in series, in parallel, or in a combination of series and parallel (mixed connection). A mixed connection means that there are both series and parallel connections among multiple battery cells 113. Multiple battery cells 113 can be directly connected in series, in parallel, or in a mixed connection together, and then the battery cluster 10 formed by multiple battery cells 113 is accommodated in the energy storage bin 20.

[0111] Here, the battery layers 11 can be connected in parallel with each other, in series with each other, or some of the battery layers 11 are connected in parallel while some of the other battery layers 11 are connected in series.

[0112] The energy storage bin 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, cylinder, or sphere. The material of the energy storage bin 20 can be an alloy material such as aluminum alloy or ferroalloy, or a polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber reinforced epoxy resin.

[0113] The energy storage bin 20 is used to encapsulate the battery cluster 10, and the energy storage bin 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cluster 10.

[0114] Exemplarily, please refer to Figure 4 and Figure 5 , the first direction is represented by X, the second direction is represented by Y, and the height direction of the battery cluster 10 is represented by Z.

[0115] In some embodiments, a pressure relief structure 1131 is provided on the outer shell of the battery cell 113. The pressure relief structure 1131 is used to discharge the internal gas of the battery cell 113.

[0116] As an example, the pressure relief structure 1131 is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 113 reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 113 reaches a predetermined threshold, the pressure relief structure 1131 performs an action or a weak structure provided in the pressure relief structure 1131 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released. This threshold design varies according to different design requirements. The threshold may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 113.

[0117] As an example, the pressure relief structure 1131 can be integrally formed with the outer shell.

[0118] As an example, the pressure relief structure 1131 can also be separately provided and connected to the outer shell.

[0119] In this application, the term "actuation" refers to the pressure relief structure 1131 generating an action or being activated to a certain state, so that the internal pressure and temperature of the battery cell 113 can be relieved. The actions generated by the pressure relief structure 1131 may include, but are not limited to: components in the pressure relief structure 1131 moving to form an exhaust passage, at least a part of the pressure relief structure 1131 breaking, shattering, being torn or opened, etc. When the pressure relief structure 1131 is actuated, the high-temperature and high-pressure substances inside the battery cell 113 will be discharged outward from the actuated part as emissions. In this way, the battery cell 113 can be pressure-relieved and temperature-relieved under a controllable pressure or temperature, thus avoiding potential more serious accidents.

[0120] The emissions from the battery cell 113 mentioned in this application include, but are not limited to: electrolytes, dissolved or separated positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by reactions, flames, etc.

[0121] The terminal posts 1132 of the battery cell 113 include a positive terminal post and a negative terminal post.

[0122] The terminal posts 1132 of the battery cell 113 in the first battery pack 111 are arranged opposite to the terminal posts 1132 of the battery cell 113 in the second battery pack 112. That is to say, the terminal posts 1132 of the battery cell 113 in the first battery pack 111 and the terminal posts 1132 of the battery cell 113 in the second battery pack 112 are located on the side where the first battery pack 111 and the second battery pack 112 are close to each other.

[0123] In the related art, the terminal posts of the battery cells in the first battery pack and the terminal posts of the battery cells in the second battery pack are respectively located on both sides of the battery layer. Insulation and safety protection need to be done between the terminal post electrical connection parts and the side plate of the energy storage bin. Protection is done on both sides, resulting in a relatively high cost. In addition, when the first battery pack and the second battery pack are connected in series or parallel at high and low voltages, the connecting copper bars or wire harnesses need to span the entire battery cluster, with a relatively high cost, large occupied space, and long copper bars or wire harnesses will increase the connection loop resistance and increase the energy loss of the product itself.

[0124] By arranging the terminal posts 1132 of the battery cell 113 in the first battery pack 111 opposite to the terminal posts 1132 of the battery cell 113 in the second battery pack 112, the distance between the high- and low-voltage connection points of the first battery pack 111 and the second battery pack 112 is shortened, which is beneficial to reducing the material consumption of the connecting member 117 between the first battery pack 111 and the second battery pack 112, thus reducing costs. At the same time, the resistance of the connection loop is reduced, and further the internal loss power consumption of the connection loop is reduced.

[0125] In the related art, the pressure relief structures of two adjacent rows of battery cells are arranged inward, with an exhaust passage spaced in the middle. There is only an epoxy board or mica sheet separating the contact surface between the battery cell and the middle exhaust passage. The distance between the battery cell core and the exhaust passage is relatively close. After the battery cell experiences thermal runaway, the outer shell of the battery cell expands, causing the outer shell to contact the exhaust passage or bringing the outer shell closer to the side wall of the exhaust passage, resulting in the pressure relief structure being unable to open or unable to fully open, preventing exhaust or causing poor exhaust. The failure to quickly release the internal pressure of the battery cell can lead to more serious accidents.

[0126] By arranging the pressure relief structure 1131 of the battery cell 113 of the first battery pack 111 on the side of the first battery pack 111 away from the second battery pack 112, and arranging the pressure relief structure 1131 of the battery cell 113 of the second battery pack 112 on the side of the second battery pack 112 away from the first battery pack 111, that is, the pressure relief structure 1131 of the battery cell 113 faces the outside of the battery cluster 10. In this way, when the battery cell 113 experiences thermal runaway, the ejected material ejected from the pressure relief structure 1131 sprays towards the outside of the battery cluster 10, which is beneficial to improving the situation where the pressure relief structure 1131 cannot open or cannot fully open. Moreover, it can improve the problem that in a double-row battery pack, when a battery cell 113 in a single-row battery pack experiences thermal runaway, the high-temperature, high-pressure gas, liquid, and some solids ejected are sprayed onto the opposite battery cell 113, causing thermal diffusion and short-circuit problems.

[0127] The energy storage device 100 includes a battery cluster 10, which is formed by stacking multiple battery layers 11 in a cluster. Compared with the traditional layered installation method, it saves more installation space in the height direction and is beneficial to improving the energy density of the energy storage device 100.

[0128] The battery cluster 10 provided by the embodiment of the present application includes battery components. On the one hand, by setting the battery components to include multiple battery layers 11, each battery layer 11 is stacked along the height direction of the battery cluster 10, and each battery layer 11 includes a first battery group 111 and a second battery group 112 arranged along a first direction. In this way, it is beneficial to improve the energy density and power of the energy storage device 100. On the other hand, by setting the pressure relief structure 1131 of the battery cell 113 of the first battery group 111 on the side of the first battery group 111 facing away from the second battery group 112, and setting the pressure relief structure 1131 of the battery cell 113 of the second battery group 112 on the side of the second battery group 112 facing away from the first battery group 111, that is, setting the pressure relief structure 1131 of the battery cell 113 of the first battery group 111 and the pressure relief structure 1131 of the battery cell 113 of the second battery group 112 on the sides of the first battery group 111 and the second battery group 112 facing away from each other, that is, the pressure relief structure 1131 of the battery cell 113 faces the outside of the battery cluster 10. In this way, when the battery cell 113 undergoes thermal runaway, the ejected matter ejected from the pressure relief structure 1131 sprays towards the outside of the battery cluster 10, which can improve the problem of short circuit between different charged bodies caused by the ejected liquid or some solid substances inside the battery cluster 10, and can minimize the influence of the first battery group 111 and the second battery group 112 on each other during thermal runaway, thereby improving the problem of thermal runaway diffusion. In addition, by arranging the pole 1132 of the battery cell 113 and the pressure relief structure 1131 of the battery cell 113 at both ends of the battery cell 113 along the first direction, the thermoelectric separation of the battery layer 11 can be realized, further improving the problem of thermal runaway diffusion. In addition, the poles 1132 of the battery cells 113 of the first battery group 111 and the poles 1132 of the battery cells 113 of the second battery group 112 are arranged opposite to each other, which is convenient for realizing the quick connection of high and low voltages between the first battery group 111 and the second battery group 112. The positions of the high and low voltage connection points of the first battery group 111 and the second battery group 112 are adjacent, which is beneficial to improving the assembly efficiency, shortening the distance between the high and low voltage connection points of the first battery group 111 and the second battery group 112, reducing the material consumption of the connecting member 117 between the first battery group 111 and the second battery group 112, thereby reducing the cost, and at the same time reducing the resistance of the connection circuit, and further reducing the internal loss power consumption of the connection circuit.

[0129] In some embodiments, please refer to Figures 4 to 6 , the battery cluster 10 further includes at least one heat exchange member 12, and the heat exchange member 12 is arranged on at least one side of the battery layer 11 along the height direction of the battery cluster 10.

[0130] Here, the heat exchange member 12 is used to exchange heat with the battery layer 11.

[0131] The heat exchange member 12 can be of various types.

[0132] Exemplarily, the interior of the heat exchanger 12 has a medium flow channel for conducting a heat exchange medium, and the heat exchange medium is used for heat exchange with the battery layer 11.

[0133] Exemplarily, the heat exchanger 12 may be a liquid cooling plate.

[0134] Of course, the heat exchanger 12 may also be other types such as a heating film.

[0135] The heat exchanger 12 may be provided on one side of the battery layer 11 along the height direction of the battery cluster 10, or the heat exchanger 12 may be provided on both sides of the battery layer 11 along the height direction of the battery cluster 10.

[0136] Here, the heat exchanger 12 may be provided between adjacent battery layers 11, and the heat exchanger 12 may also be provided between the battery layer 11 and the energy storage bin 20.

[0137] Exemplarily, at least part of the heat exchanger 12 is provided between adjacent battery layers 11 and is used for heat exchange with the adjacent battery layers 11.

[0138] Part of the heat exchanger 12 may be provided between adjacent battery layers 11, and there may also be a heat exchanger 12 provided between the battery layer 11 and the top wall of the energy storage bin 20, and there may also be a heat exchanger 12 provided between the battery layer 11 and the bottom wall of the energy storage bin 20.

[0139] It is also possible that all the heat exchangers 12 are provided between adjacent battery layers 11. In this embodiment, no heat exchanger 12 is provided on the top side of the uppermost battery layer 11 and the bottom side of the lowermost battery layer 11.

[0140] Here, by providing at least part of the heat exchanger 12 between adjacent battery layers 11, the heat exchanger 12 can simultaneously exchange heat with the battery layers 11 on opposite sides, which is beneficial to improving the heat exchange efficiency of the heat exchanger 12 with the battery layer 11. That is to say, while improving the energy density of the energy storage device 100, the heat exchange efficiency can also be improved. In addition, by providing the heat exchanger 12 between adjacent battery layers 11, it is beneficial to improve the support strength of the battery cluster 10.

[0141] It should be noted that the specific type of the heat exchange medium is not limited herein, as long as it can achieve a heat exchange effect on the battery cell 113. For example, it may be gaseous or liquid. In the embodiments of the present disclosure, the heat exchange medium is taken as a coolant for description.

[0142] It should be noted that the specific number of the medium flow channels is not limited herein. It may be one or multiple.

[0143] Exemplarily, please refer to Figure 9, the heat exchanger 12 further includes a liquid inlet 122 and a liquid outlet 123, both of which are in communication with the medium flow channel.

[0144] Here, the liquid inlet 122 and the liquid outlet 123 of the heat exchanger 12 are used for connecting to the pipelines of liquid storage devices such as the air conditioning system or water tank of the electrical device.

[0145] Exemplarily, the liquid inlet 122 and the liquid outlet 123 of the heat exchanger 12 are provided at the front end of the battery cluster 10.

[0146] The principle of the heat exchanger 12 for heat exchange with the battery cell 113 is as follows: the heat exchange medium output by the heat exchange medium source (not shown in the figure) enters the medium flow channel through the liquid inlet 122 of the heat exchanger 12. After the heat exchange medium exchanges heat with the battery cell 113, the heat exchange medium flows out through the liquid outlet 123 of the heat exchanger 12, completing the heat exchange with the battery cell 113.

[0147] Here, the heat exchanger 12 for heat exchange with the battery cell 113 can dissipate heat from the battery cell 113 or heat the battery cell 113.

[0148] The principle of the heat exchanger 12 for dissipating heat from the battery cell 113 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the liquid inlet 122 of the heat exchanger 12. After the heat exchange medium absorbs the heat generated during the operation of the battery cell 113, the heat exchange medium flows out through the liquid outlet 123 of the heat exchanger 12, releasing the heat and completing the cooling and heat dissipation of the battery cell 113.

[0149] The principle of the heat exchanger 12 for heating the battery cell 113 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the liquid inlet 122 of the heat exchanger 12. The heat exchange medium transfers heat to the battery cell 113 to realize heating of the battery cell 113. After that, the heat exchange medium flows out through the liquid outlet 123 of the heat exchanger 12, completing the heating of the battery cell 113.

[0150] In this embodiment, by providing the heat exchanger 12 on at least one side of the battery layer 11 in the height direction of the battery cluster 10, heat exchange can be performed on the battery layer 11. In addition, the setting of the heat exchanger 12 is also beneficial to improving the support strength of the battery cluster 10.

[0151] By stacking multiple battery layers 11 into a cluster to form the battery cluster 10, both the upper and lower surfaces of each battery layer 11 are in contact with the heat exchanger 12. Compared with a single heat exchanger 12, the upper and lower surfaces participate in cooling or heating simultaneously, which can improve the cooling or heating effect and rate. At the same time, the temperature of the battery cells 113 can be made more uniform, the temperature difference between the battery cells 113 can be reduced, and the service life of the battery cluster 10 can be increased.

[0152] In some embodiments, please refer toFigures 4 to 6 , the first battery pack 111 and the second battery pack 112 of the same-layer battery layer 11 share the heat exchange member 12.

[0153] Exemplarily, the plane where the first direction and the second direction are located is the first plane. When projected onto the first plane, there is an overlapping area between the projections of the first battery pack 111 and the second battery pack 112 of the same-layer battery layer 11 and the projection of the same heat exchange member 12, or the projections of the first battery pack 111 and the second battery pack 112 of the same-layer battery layer 11 are located within the projection range of the same heat exchange member 12.

[0154] Here, it can be the top-side common heat exchange member 12 of the battery layer 11, or the bottom-side common heat exchange member 12 of the battery layer 11, or the top-side common heat exchange member 12 of the battery layer 11 and the bottom side of the battery layer 11 is also the common heat exchange member 12.

[0155] Here, the first battery pack 111 and the second battery pack 112 of the same-layer battery layer 11 share the heat exchange member 12. While realizing the thermal management of the battery layer 11, it is also beneficial to improve the support strength for the battery layer 11, reduce the number of components, and thus improve the assembly efficiency.

[0156] In some embodiments, the battery cluster 10 further includes an adhesive layer, and the battery layer 11 and the heat exchange member 12 are adhesively connected through the adhesive layer.

[0157] Exemplarily, the adhesive layer is, for example, a thermally conductive structural adhesive.

[0158] Here, the battery layer 11 and the heat exchange member 12 are adhesively connected through the adhesive layer, which can make the battery layer 11 and the heat exchange member 12 have a good heat conduction interface, is beneficial to the rapid heat exchange between the battery layer 11 and the heat exchange member 12, realizes the thermal management of the battery layer 11, and at the same time, the battery layer 11 is adhered to the heat exchange member 12 through the adhesive layer to realize the fixed installation of the battery layer 11 relative to the entire battery cluster 10. It is beneficial to improve the structural stability of the battery cluster 10.

[0159] It can be understood that the battery layer 11 and the heat exchange member 12 can be adhesively connected first to form a pre-assembled part, and then assembled according to requirements, which is beneficial to further improving the assembly efficiency.

[0160] In some embodiments, the battery cluster 10 further includes a heat conductive member, and the heat conductive member is clamped between the battery layer 11 and the heat exchange member 12.

[0161] Exemplarily, the heat conductive member can be a heat conductive pad.

[0162] Here, by clamping a heat conductive member between the battery layer 11 and the heat exchange member 12, it is beneficial to further improve the heat transfer efficiency between the battery layer 11 and the heat exchange member 12, and thus improve the heat exchange efficiency of the heat exchange member 12.

[0163] In some embodiments, referring to Figures 4 to 6 , the battery assembly further includes at least one strap 13. The strap 13 is disposed on at least one side of the battery layer 11 along the height direction of the battery cluster 10, and both ends of the strap 13 in the second direction are respectively connected to both ends of the battery layer 11 in the second direction.

[0164] Here, the strap 13 may be disposed on one side of the battery layer 11 along the height direction of the battery cluster 10, or the strap 13 may be disposed on both sides of the battery layer 11 along the height direction of the battery cluster 10. That is to say, the top side and the bottom side of the battery layer 11 are both provided with the strap 13.

[0165] It should be noted that the number of straps 13 provided for each battery layer 11 is not limited herein. The number of straps 13 provided for different battery layers 11 may be the same or different.

[0166] Exemplarily, each battery layer 11 is provided with 8 straps 13, and each of the first battery group 111 and the second battery group 112 is provided with 4 straps 13.

[0167] Referring to Figure 7 , 2 straps 13 are respectively provided on the top side and the bottom side of the first battery group 111, and the two straps 13 on the top side are spaced apart in the first direction, and the two straps 13 on the bottom side are also spaced apart in the first direction. The straps 13 on the top side and the straps 13 on the bottom side may be disposed opposite to each other or may be staggered.

[0168] Referring to Figure 8 , 2 straps 13 are respectively provided on the top side and the bottom side of the second battery group 112, and the two straps 13 on the top side are spaced apart in the first direction, and the two straps 13 on the bottom side are also spaced apart in the first direction. The straps 13 on the top side and the straps 13 on the bottom side may be disposed opposite to each other or may be staggered.

[0169] Exemplarily, the material of the strap 13 may be a high-strength metal such as steel, or other high-strength composite materials.

[0170] Both the first battery group 111 and the second battery group 112 include a plurality of battery cells 113 arranged in the second direction. By respectively connecting both ends of the strap 13 in the second direction to both ends of the battery layer 11 in the second direction, in this way, the battery cells 113 of the first battery group 111 and the second battery group 112 can be pressed tightly, which is used to constrain the battery layer 11 in the second direction and improve the stability of the battery layer 11. In addition, the strap 13 can also be used to withstand the expansion force of the battery cells 113. The expansion force here specifically refers to the acting force applied to the strap 13 due to the expansion deformation of the battery cells 113. As an example, the strap 13 mainly withstands the expansion force in the second direction.

[0171] It should be noted that the connection manner of the pulling belt 13 to both ends of the battery layer 11 along the second direction is not limited herein. Exemplarily, the pulling belt 13 can be fixedly connected, snapped, inserted, welded, etc. to both ends of the battery layer 11 along the second direction.

[0172] By providing the pulling belt 13, and both ends of the pulling belt 13 being respectively connected to both ends of the battery layer 11 along the second direction, the pulling belt 13 can provide sufficient tensile strength at both ends of the battery layer 11 along the second direction, and improve the problem that the product structure fails due to the expansion of the battery cell 113 during use.

[0173] Here, by providing the pulling belt 13 and the heat exchange member 12, it is beneficial to fix the battery layer 11, so that the pulling belt 13, the heat exchange member 12 and the battery layer 11 form a stable whole. Thus, the setting of the housing can be reduced, that is, the normal use of the battery layer 11 can be realized without encapsulation by the housing. Only a storage bin 20 needs to be provided, and the assembled battery cluster 10 is arranged in the storage bin 20. In this way, it is beneficial to reduce components, lower costs, and also improve the energy density.

[0174] In some embodiments, please refer to Figure 5 and Figure 9 , the heat exchange member 12 is provided with an avoidance groove 121 extending along the second direction.

[0175] The avoidance groove 121 can avoid the components protruding from the battery layer 11, and is also beneficial to position and limit the components protruding from the battery layer 11, improving the stability of the components protruding from the battery layer 11. On the other hand, it is beneficial to the fitting of the battery layer 11 and the heat exchange member 12, improving the heat exchange efficiency.

[0176] Exemplarily, at least a part of the pulling belt 13 is received in the avoidance groove 121.

[0177] Exemplarily, the number of the avoidance grooves 121 corresponds to the number of the pulling belts 13, that is, one pulling belt 13 corresponds to one avoidance groove 121.

[0178] Of course, it can also be that one avoidance groove 121 corresponds to multiple pulling belts 13.

[0179] Exemplarily, the width of the avoidance groove 121 is greater than the width of the pulling belt 13, that is, the dimension of the avoidance groove 121 along the first direction is greater than the dimension of the pulling belt 13 along the first direction. In this way, it is convenient for the assembly of the pulling belt 13.

[0180] Exemplarily, both the top wall and the bottom wall of the heat exchange member 12 are provided with the avoidance grooves 121.

[0181] Here, by providing an avoidance groove 121 on the heat exchange member 12 and accommodating at least a part of the pulling belt 13 in the avoidance groove 121, on the one hand, it is beneficial to position and limit the pulling belt 13, improving the stability of the pulling belt 13. On the other hand, it is beneficial for the battery layer 11 to fit with the heat exchange member 12, improving the heat exchange efficiency.

[0182] In some embodiments, referring to Figure 4 , the battery cluster 10 further includes at least one connecting frame 14. Each connecting frame 14 includes two first connecting beams 141 and two second connecting beams 142. The two first connecting beams 141 extend along the height direction of the battery cluster 10, and the two second connecting beams 142 extend along the first direction. The first connecting beam 141 and the second connecting beam 142 are connected in sequence to form the connecting frame 14. The two first connecting beams 141 are respectively connected to the two sides of the heat exchange member 12 along the first direction, and the two second connecting beams 142 are respectively arranged on the top side and the bottom side of the battery cluster 10.

[0183] The first connecting beam 141 and the second connecting beam 142 are connected in sequence to form the connecting frame 14, that is to say, one of the second connecting beams 142 is connected to the bottoms of the two first connecting beams 141, and the other second connecting beam 142 is connected to the tops of the two first connecting beams 141.

[0184] Exemplarily, the two sides of the heat exchange member 12 along the first direction protrude from the battery layer 11, that is to say, the dimension of the heat exchange member 12 along the first direction is larger than the dimension of the battery layer 11 along the first direction. In this way, it is convenient for the two first connecting beams 141 to be respectively connected to the two sides of the heat exchange member 12 along the first direction, which is beneficial for the heat exchange member 12 to transfer the force received to the connecting frame 14, beneficial for improving the support strength for the battery layer 11, and also beneficial for reducing the possibility of the battery layer 11 at the lower layer being crushed due to excessive stacking.

[0185] Exemplarily, the two sides of the heat exchange member 12 along the second direction protrude from the battery layer 11, that is to say, the dimension of the heat exchange member 12 along the second direction is larger than the dimension of the battery layer 11 along the second direction.

[0186] Here, by providing the connecting frame 14 which surrounds the periphery of the battery cluster 10, the battery cluster 10 is connected as a whole, further improving the overall structural stability and strength of the battery cluster 10. In addition, the two first connecting beams 141 are respectively connected to both sides of the heat exchanger 12 along the first direction. Thus, the connecting frame 14 can bear the weight of the battery layer 11 through the heat exchanger 12, which helps to reduce the pressure of the upper battery layer 11 on the lower battery layer 11, that is, the pressure borne by the lower battery layer 11 can be minimized as much as possible, further improving the reliability of the battery cluster 10. Moreover, more battery layers 11 can be arranged in the height direction of the battery cluster 10, improving the energy density of the energy storage device 100 while enhancing the reliability of the energy storage device 100.

[0187] The number of the first connecting beams 141 and the second connecting beams 142 is determined according to the size and weight of the battery layer 11 and the number of stacked battery layers 11.

[0188] Exemplarily, the number of the battery layers 11 can be any value among 2, 3, 5, 6, 8, 10, 12, 13, 15, 16, 18, 20 or any value between any two of them.

[0189] In some embodiments, please refer to Figure 4 , the number of the connecting frames 14 is multiple, and the connecting frames 14 are arranged at intervals along the second direction.

[0190] Here, by providing multiple connecting frames 14 which are arranged at intervals along the second direction, it is beneficial to improve the overall stability of the battery cluster 10.

[0191] In some embodiments, please refer to Figures 5 to 8 , the battery layer 11 further includes at least one end plate 115, and the first battery group 111 and / or the second battery group 112 are provided with end plates 115 at at least one end along the second direction.

[0192] Exemplarily, the first battery group 111 and the second battery group 112 can share one end plate 115, or can be respectively provided with corresponding end plates 115.

[0193] In the embodiments where the first battery group 111 and the second battery group 112 are separately provided with end plates 115, the separate end plates 115 can provide higher strength, especially the bending stiffness of the end plates 115 along the length direction (the first direction), improving the situation where the insufficient stiffness of the end plates 115 causes excessive deformation and failure of the end plates 115 when the battery cells 113 expand, or the situation where the excessive expansion of the battery cells 113 causes the failure of the outer shell.

[0194] The number of the end plates 115 can be one or multiple.

[0195] The battery layer 11 may have an end plate 115 provided at one end in the second direction, or the battery layer 11 may have end plates 115 provided at both ends in the second direction. That is, the first battery group 111 and / or the second battery group 112 may have an end plate 115 provided at one end in the second direction, or the first battery group 111 and / or the second battery group 112 may have end plates 115 provided at both ends in the second direction.

[0196] Here, the end plate 115 is used to constrain the battery layer 11 in the first direction and at least bear the expansion force of the battery cell 113. The expansion force here specifically refers to the force exerted on the end plate 115 due to the expansion deformation of the battery cell 113. As an example, the end plate 115 mainly bears the expansion force in the first direction.

[0197] The specific structure and material of the end plate 115 are not limited. As an example, the end plate 115 can be a beam-like structure and can be made of any suitable material, such as metal materials, polymer materials, composite materials, etc.

[0198] In some embodiments, please refer to Figures 5 to 8 , the tension belt 13 is connected to the end plate 115 at at least one end in the second direction.

[0199] Exemplarily, the first battery group 111 and / or the second battery group 112 have end plates 115 provided at both ends in the second direction, and the tension belt 13 is connected to the end plates 115 at both ends in the second direction.

[0200] Here, the battery cells are pressed tightly between the two ends by the tension force of the tension belt 13, and the tension belt 13 and the end plate 115 together bear the expansion force of the battery layer 11. In this way, it is beneficial to improve the structural stability and reliability of the battery cluster 10.

[0201] In some embodiments, please refer to Figure 7 , each first battery group 111 includes a plurality of tension belts 13, and at least some of the tension belts 13 are arranged at intervals in the first direction of the first battery group 111.

[0202] Exemplarily, the tension belts 13 located on the top side of the first battery group 111 are arranged at intervals in the first direction of the first battery group 111, and / or the tension belts 13 located on the bottom side of the first battery group 111 are arranged at intervals in the first direction of the first battery group 111.

[0203] Here, by providing a plurality of tension belts 13, it is beneficial to improve the ability of the tension belts 13 to bear the expansion force. In this way, it is beneficial to further improve the structural stability and reliability of the battery cluster 10.

[0204] In some embodiments, please refer to Figure 8, each second battery pack 112 includes a plurality of strap members 13, and at least a portion of the strap members 13 are spaced apart along a first direction of the second battery pack 112.

[0205] Exemplarily, the strap members 13 located on the top side of the second battery pack 112 are spaced apart along the first direction of the second battery pack 112, and / or the strap members 13 located on the bottom side of the second battery pack 112 are spaced apart along the first direction of the second battery pack 112.

[0206] Here, by providing a plurality of strap members 13, it is beneficial to improve the ability of the strap members 13 to withstand the expansion force. Thus, it is beneficial to further improve the structural stability and reliability of the battery cluster 10.

[0207] In some embodiments, referring to Figures 5 to 8 , the battery assembly further includes an insulating member 116. Along a second direction, an insulating member 116 is provided between the battery cells 113 at the ends of the first battery pack 111 and / or the second battery pack 112 and the end plate 115.

[0208] Exemplarily, insulating members 116 are provided between the end plate 115 and the battery cells 113.

[0209] Exemplarily, the insulating member 116 can be a non-metallic member to achieve an insulating effect.

[0210] Exemplarily, the insulating member 116 can be an insulating cover. The insulating cover can be formed with a receiving groove on a side facing the battery cell 113, so that the battery cells 113 at the ends are received in the receiving groove. Thus, while achieving an insulating effect, it is beneficial to save space and improve the energy density.

[0211] Here, by designing an insulating member 116 between the end plate 115 and the end battery cells 113, the insulating member 116 is used to ensure insulation between the battery cells 113 and the end plate 115, and to a certain extent, it can avoid the problem of short circuit formation between the outer shell of the battery cell 113 and the end plate 115 after insulation failure on the surface of the battery cell 113.

[0212] In some embodiments, referring to Figures 5 to 8 , the first battery pack 111 includes a first output terminal 1111 and a second output terminal 1112 respectively located at two ends of the first battery pack 111 along the second direction, and both the first output terminal 1111 and the second output terminal 1112 are located on a side of the first battery pack 111 close to the second battery pack 112. The second battery pack 112 includes a third output terminal 1121 and a fourth output terminal 1122 respectively located at two ends of the second battery pack 112 along the second direction, and both the third output terminal 1121 and the fourth output terminal 1122 are located on a side of the second battery pack 112 close to the first battery pack 111.

[0213] Exemplarily, the battery assembly includes a connecting member 117. The first output terminal 1111 and the third output terminal 1121 are electrically connected through the connecting member 117, and the second output terminal 1112 and the fourth output terminal 1122 are electrically connected through the connecting member 117.

[0214] Exemplarily, the adjacent battery cells 113 of the first battery pack 111 are connected in series or in parallel. The first output terminal 1111 and the second output terminal 1112 at both ends of the first battery pack 111 are the total positive electrode and the total negative electrode of the first battery pack 111 respectively. The total positive electrode and the total negative electrode of the first battery pack 111 are used to be connected in series or in parallel with the total positive electrode and the total negative electrode of the second battery pack 112.

[0215] Exemplarily, the adjacent battery cells 113 of the second battery pack 112 are connected in series or in parallel. The third output terminal 1121 and the fourth output terminal 1122 at both ends of the second battery pack 112 are the total negative electrode and the total positive electrode of the second battery pack 112 respectively. The total positive electrode and the total negative electrode of the second battery pack 112 are used to be connected in series or in parallel with the total positive electrode and the total negative electrode of the first battery pack 111.

[0216] Exemplarily, the first output terminal 1111 and the third output terminal 1121 are electrically connected through the connecting member 117, and the second output terminal 1112 and the fourth output terminal 1122 are electrically connected through the connecting member 117. That is to say, the connecting member 117 is used to connect the first battery pack 111 and the second battery pack 112 in series or in parallel.

[0217] Exemplarily, the adjacent battery cells 113 of the first battery pack 111 can be connected in series or in parallel through a connecting tab 114.

[0218] Exemplarily, the adjacent battery cells 113 of the second battery pack 112 can be connected in series or in parallel through a connecting tab 114.

[0219] Exemplarily, the connecting tab 114 can be a duralumin tab.

[0220] Here, by arranging both the first output terminal 1111 and the second output terminal 1112 on the side of the first battery pack 111 close to the second battery pack 112, and both the third output terminal 1121 and the fourth output terminal 1122 on the side of the second battery pack 112 close to the first battery pack 111, that is, arranging the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122 close to the middle position of the battery layer 11, it is possible to improve the problem of high cost caused by separately insulating and protecting the first battery pack 111 and the second battery pack 112. In addition, it is beneficial to shorten the distance between the first output terminal 1111 and the third output terminal 1121, and between the second output terminal 1112 and the fourth output terminal 1122, which is beneficial to reducing the material consumption of the connecting member 117 between the first output terminal 1111 and the third output terminal 1121, and between the second output terminal 1112 and the fourth output terminal 1122, thereby reducing costs. At the same time, the resistance of the connection loop is reduced, and further the internal loss power consumption of the connection loop is reduced.

[0221] In some embodiments, referring to Figures 5 to 8 , the connecting member 117 is located on the side of the end plate 115 away from the battery layer 11.

[0222] In other words, at least part of the connecting member 117 is arranged on the side of the end plate 115 facing away from the battery layer 11.

[0223] Exemplarily, at least part of the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122 is also arranged on the side of the end plate 115 facing away from the battery layer 11. In this way, it is convenient for the first output terminal 1111 to be electrically connected to the third output terminal 1121 through the connecting member 117, and for the second output terminal 1112 to be electrically connected to the fourth output terminal 1122 through the connecting member 117.

[0224] Here, by arranging the connecting member 117 outside the end plate 115, it is convenient to realize the assembly of the connecting member 117 and improve the assembly efficiency.

[0225] In some embodiments, continue to refer to Figures 5 to 8 , the battery assembly includes an insulating mounting seat 118 arranged on the end plate 115, and the first output terminal 1111 is connected to the insulating mounting seat 118.

[0226] Exemplarily, the second output terminal 1112 is connected to the insulating mounting seat 118.

[0227] Exemplarily, the third output terminal 1121 is connected to the insulating mounting seat 118.

[0228] Exemplarily, the fourth output terminal 1122 is connected to the insulating mounting seat 118.

[0229] Exemplarily, an insulating mounting seat 118 is provided between the end plate 115 and the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122.

[0230] Exemplarily, the insulating mounting seat 118 can be a non-metal part to achieve an insulating effect.

[0231] Exemplarily, the insulating mounting seat 118 is provided with a mounting groove.

[0232] The mounting groove can be used to accommodate the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and / or the fourth output terminal 1122, which is beneficial to further improving the protection effect of the insulating mounting seat 118 and also beneficial to positioning the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122, thereby improving the assembly efficiency.

[0233] Exemplarily, the insulating mounting seat 118 is fixedly connected to the end plate 115.

[0234] Here, by providing the insulating mounting seat 118 between the end plate 115 and the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122, the insulating mounting seat 118 is used to ensure insulation between the first output terminal 1111, the second output terminal 1112, the third output terminal 1121, and the fourth output terminal 1122 and the end plate 115. At the same time, it can also be used to assist in electrically connecting the first output terminal 1111 and the third output terminal 1121 through the connecting member 117, and the second output terminal 1112 and the fourth output terminal 1122 through the connecting member 117, that is, it is beneficial to improve the assembly efficiency.

[0235] In some embodiments, please refer to Figures 4 to 6 , the battery cluster 10 further includes at least one battery management system 15, and the battery management system 15 is disposed on the end plate 115.

[0236] Exemplarily, each battery layer 11 includes a battery management system 15.

[0237] Of course, it can also be that a plurality of battery layers 11 share one battery management system 15.

[0238] The battery management system 15 (BMS) is mainly for intelligent management and maintenance of each battery unit, monitoring the state of the battery, preventing the battery from overcharging and over-discharging, so as to extend the service life of the battery.

[0239] Exemplarily, the battery management system 15 is disposed at the front end of the battery layer 11.

[0240] Here, by disposing the battery management system 15 on the end plate 115, it is convenient for the electrical connection between the battery management system 15 and the battery layer 11, and it is beneficial to shorten the connection line between the battery management system 15 and the battery layer 11.

[0241] In some embodiments, referring to Figures 6 to 7 , the battery layer 11 further includes a sampling wire harness 119 extending in the second direction. The sampling wire harness 119 is disposed between the first battery pack 111 and the second battery pack 112 of the same battery layer 11, and the sampling wire harness 119 is connected to the battery management system 15.

[0242] Exemplarily, one sampling wire harness 119 is correspondingly disposed for the first battery pack 111, and one sampling wire harness 119 is also correspondingly disposed for the second battery pack 112.

[0243] The sampling wire harness 119 is used to collect the voltage and temperature of the battery cells 113. The sampling wire harness 119 has a plurality of branches for connecting to the rigid aluminum busbars and output terminals between each battery cell 113.

[0244] By disposing the sampling wire harness 119 between the first battery pack 111 and the second battery pack 112 of the same battery layer 11, it is convenient for the electrical connection between the battery management system 15 and the sampling wire harness 119, and it is beneficial to shorten the connection line between the battery management system 15 and the sampling wire harness 119.

[0245] Exemplarily, the sampling wire harness 119 is connected to the battery management system 15 at the front end of the battery layer 11.

[0246] Exemplarily, the sampling wire harness 119 is connected to the battery management system 15 by plugging with a connector.

[0247] Here, each row of battery packs (the first battery pack 111 or the second battery pack 112) can be designed as a standard battery pack module, and the installation of the high-voltage connection busbars 114 and the sampling wire harness 119 between the battery cells 113 can be independently carried out, which is beneficial to improving the production efficiency of the product.

[0248] Exemplarily, the battery cell 113 includes a positive electrode post and a negative electrode post, and the positive electrode post and the negative electrode post are arranged along the height direction of the battery cell 113. The sampling wire harness 119 is disposed between the positive electrode post and the negative electrode post.

[0249] Exemplarily, an insulating plate 16 is disposed between the first battery pack 111 and the second battery pack 112, and the insulating plate 16 extends in the second direction.

[0250] Exemplarily, the insulating plate 16 can use insulating materials such as plastic plates and epoxy plates.

[0251] Here, the insulating board 16 is used to separate the conductive components between the first battery pack 111 and the second battery pack 112, which is conducive to reducing the possibility of short circuit between the first battery pack 111 and the second battery pack 112.

[0252] In the description of the present disclosure, the descriptions referring to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present disclosure and the features of different embodiments or examples.

[0253] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are included within the protection scope of the present disclosure.

Claims

1. A battery cluster, characterized in that, The battery cluster includes a battery assembly, the battery assembly includes a plurality of battery layers stacked along a height direction of the battery cluster, each of the battery layers includes a first battery group and a second battery group arranged along a first direction, the first battery group and the second battery group each include a plurality of battery cells arranged along a second direction, the first direction intersects with the second direction and are both perpendicular to the height direction of the battery cluster; Among them, the pole of the battery cell and the pressure relief structure of the battery cell are respectively located at the two ends of the battery cell along the first direction, and the pole of the battery cell of the first battery group is arranged opposite to the pole of the battery cell of the second battery group, the pressure relief structure of the battery cell of the first battery group is located on the side of the first battery group away from the second battery group, and the pressure relief structure of the battery cell of the second battery group is located on the side of the second battery group away from the first battery group.

2. The battery cluster according to claim 1, characterized in that, The battery cluster further includes at least one heat exchange component, and the heat exchange component is disposed on at least one side of the battery layer along a height direction of the battery cluster.

3. The battery cluster according to claim 2, wherein, The heat exchange component has a medium flow channel inside, and the medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery layer.

4. The battery cluster according to claim 2, characterized in that, The first battery group and the second battery group in the same battery layer share the heat exchange element.

5. The battery cluster according to claim 2, characterized in that, At least part of the heat exchange element is disposed between adjacent battery layers and is used to perform heat exchange with adjacent battery layers.

6. The battery cluster according to claim 2, wherein The battery cluster further includes an adhesive layer, and the battery layer and the heat exchange element are adhesively connected via the adhesive layer; and / or, The battery cluster further includes a heat conductive member, which is sandwiched between the battery layer and the heat exchange member.

7. The battery cluster according to claim 2, wherein The heat exchange element is provided with an avoidance groove extending along the second direction.

8. The battery cluster according to any one of claims 1 to 7, characterized in that, The battery assembly further includes at least one drawstring, which is disposed on at least one side of the battery layer along the height direction of the battery cluster, and two ends of the drawstring along the second direction are respectively connected to two ends of the battery layer along the second direction.

9. The battery cluster according to claim 8, wherein The battery layer further includes at least one end plate, and the end plate is disposed at at least one end of the first battery group and / or the second battery group along the second direction, and at least one end of the pull belt along the second direction is connected to the end plate.

10. The battery cluster according to claim 8, characterized in that, Each of the first battery packs comprises a plurality of the pull straps, at least some of which are arranged at intervals along a first direction of the first battery pack; and / or, Each of the second battery groups includes a plurality of the pull straps, and at least some of the pull straps are spaced apart along the first direction of the second battery group.

11. The battery cluster according to any one of claims 1-7, characterized in that, The first battery group includes a first output terminal and a second output terminal respectively located at the two ends of the first battery group along the second direction, and the first output terminal and the second output terminal are both located on a side of the first battery group close to the second battery group; the second battery group includes a third output terminal and a fourth output terminal respectively located at the two ends of the second battery group along the second direction, and the third output terminal and the fourth output terminal are both located on a side of the second battery group close to the first battery group.

12. The battery cluster according to claim 11, characterized in that, The battery assembly includes a connecting member, the first output terminal and the third output terminal are electrically connected through the connecting member, and the second output terminal and the fourth output terminal are electrically connected through the connecting member.

13. The battery cluster according to claim 12, wherein, The battery assembly further includes at least one end plate, and the end plate is provided at at least one end of the first battery pack and / or the second battery pack along the second direction.

14. The battery cluster according to claim 13, wherein The connecting member is located on a side of the end plate away from the battery layer.

15. The battery cluster according to claim 13, wherein The battery assembly further includes an insulating member; along the second direction, the insulating member is provided between the battery cell at the end of the first battery pack and / or the second battery pack and the end plate.

16. The battery cluster according to claim 13, characterized in that, The battery assembly includes an insulating mounting seat provided on the end plate; the first output terminal is connected to the insulating mounting seat; and / or, The second output terminal is connected to the insulating mounting seat; and / or, The third output terminal is connected to the insulating mounting seat; and / or, The fourth output terminal is connected to the insulating mounting seat.

17. The battery cluster according to claim 13, characterized in that, The battery cluster further includes at least one battery management system, and the battery management system is provided on the end plate.

18. The battery cluster according to claim 17, wherein The battery layer further includes a sampling wire harness extending along the second direction, the sampling wire harness is provided between the first battery pack and the second battery pack in the same battery layer, and the sampling wire harness is connected to the battery management system.

19. The battery cluster according to any one of claims 2 to 7, characterized in that, The battery cluster further includes at least one connection frame, each connection frame includes two first connection beams and two second connection beams, the two first connection beams extend along the height direction of the battery cluster, the two second connection beams extend along the first direction, and the first connection beam and the second connection beam are sequentially connected to form the connection frame; the two first connection beams are respectively connected to two sides of the heat exchange member along the first direction, and the two second connection beams are respectively provided on the top side and the bottom side of the battery cluster.

20. The battery cluster according to claim 19, wherein, The number of the connection frames is multiple, and the connection frames are arranged at intervals along the second direction.

21. An energy storage device, characterized in that, It includes an energy storage bin and the battery cluster according to any one of claims 1 to 20, and the battery cluster is arranged in the energy storage bin.

22. An energy storage system, characterized in that, It includes a power conversion device and the energy storage device according to claim 21, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

23. An electrical device, characterized in that, It includes the battery cluster according to any one of claims 1 to 20, the energy storage device according to claim 21 or the energy storage system according to claim 22, and the battery cluster is used to store or provide electric energy.

24. A charging network, characterized in that, It includes a charging pile and the energy storage device according to claim 21 or the energy storage system according to claim 22, and the energy storage device or the energy storage system is used to provide electric energy for the charging pile.

Images