Electric storage device and power consumption device

Abstract

Embodiments of the present application provide a power storage device and a power consumption device. Here, the power storage device includes at least two battery cells arranged in sequence along a first direction, and a partition member provided between two adjacent battery cells. The partition member includes a first side surface adjacent to one battery cell, and at least one first partition strip is provided on the first side surface. At least one first passage surrounded by the first partition strip, the first side surface, and the battery cell is formed. Embodiments of the present application use a method of forming a cooling passage by partitioning with a first partition strip. After the partition member deteriorates, the first partition strip is not easily deformed, the shape and flow area of the cooling passage do not change, the cooling efficiency does not decrease, the service life of the battery cell is extended, and the problem that the partition member deteriorates and deforms and the cooling efficiency decreases is alleviated.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of Chinese Patent Application No. 202221989960.1, titled "Power Storage Device and Power Consumption Device", filed on July 29, 2022, and all the contents of this application are incorporated herein by reference.

[0002] This application relates to the field of battery technology, and particularly to power storage devices and power consumption devices.

Background Art

[0003] In some related technologies, a partition plate is installed between two adjacent battery cells of a power storage device, a cooling passage is formed between the partition plate and the battery cell, and after the partition plate deteriorates and deforms, the cooling effect of the cooling passage weakens.

Summary of the Invention

[0004] Some embodiments of this application provide a power storage device and a power consumption device for alleviating the problem of weakened cooling effect.

[0005] Some embodiments of this application provide a power storage device, which includes at least two battery cells arranged in sequence along a first direction, and a partition member provided between two adjacent battery cells, the partition member includes a first side surface adjacent to one of the at least two battery cells, at least one first partition strip is provided on the first side surface, and at least one first passage surrounded by the first partition strip, the first side surface and the battery cell is formed.

[0006] By the method of forming a cooling passage partitioned by the first partition strip, after the partition member deteriorates, the first partition strip is not easily deformed, the shape and flow area of the cooling passage are not easily changed, and the problem that the cooling effect weakens due to the deterioration and deformation of the partition member is alleviated.

[0007] In some embodiments, the first partition strip abuts against the adjacent battery cell.

[0008] The first partition strip abuts against the adjacent battery cell and can partition the space between the partition member and the battery cell into at least two first passages, and the temperature rise of the battery cell can be controlled by utilizing the flow of the refrigerant in the first passages.

[0009] In some embodiments, the first partition strip includes an abutting surface that abuts against the battery cell, and the abutting surface is a flat surface.

[0010] The abutting surface where the first partition strip abuts against the battery cell is a flat surface, which can increase the abutting area between the first partition strip and the battery cell, make the force received by the heat exchange surface of the battery cell uniform, and improve the cycle life of the battery cell.

[0011] In some embodiments, the partition member includes a second side surface adjacent to another one of at least two battery cells, and at least one second partition strip is provided on the second side surface, and at least one second passage surrounded by the second partition strip, the second side surface and the battery cell is formed.

[0012] Partition strips are provided on both the first side surface and the second side surface of the partition member, and both partition the cooling passages, and heat exchange and temperature reduction can be performed on two side surfaces of the battery cell, both sides of the battery cell are cooled, the temperature reduction is uniform, the temperature difference between the battery cells is small, and the temperature is uniform.

[0013] In some embodiments, the second partition strip abuts against the adjacent battery cell.

[0014] The first partition strip on the first side of the partition member abuts against the adjacent battery cell, and the second partition strip on the second side abuts against the adjacent battery cell, which can make the force-receiving surface of the heat exchange surface of the battery cell uniform and improve the cycle life of the battery cell.

[0015] In some embodiments, at least one of the first passages communicates with the second passage in the first direction.

[0016] The refrigerant fluid flows through the first passage, the second passage, and between the first passage and the second passage, which can further improve the cooling effect and cycle life of the battery cell.

[0017] In some embodiments, the partition member includes a second side adjacent to another one of at least two battery cells, and the second side abuts against the adjacent battery cell.

[0018] At least one first partition strip is installed on the first side of the partition member, and the at least one first partition strip abuts against the adjacent battery cell. No partition strip is installed on the second side of the partition member, and the second side directly abuts against the adjacent battery cell. That is, the cooling passage is installed on one side of the partition member, and the other side is in close contact with the large surface of the battery cell, increasing the force-receiving area of the battery cell and alleviating the problem of uneven force-receiving of the battery cell and the reduction of the cycle life.

[0019] In some embodiments, the first partition strip extends along a second direction intersecting the first direction.

[0020] The first partition strip extends along the second direction. Correspondingly, the first passage extends along the second direction, and the refrigerant flows along the first passage to cool the battery cell, which can improve the cooling efficiency of the battery cell.

[0021] In some embodiments, one end of the first partition strip is cross - connected by an inclined surface extending along the second direction and is configured in a corner shape that transitions in an arc shape.

[0022] The end of the first partition strip is configured in a corner shape that is cross - connected by an inclined surface and transitions in an arc shape, which can significantly reduce the resistance when the refrigerant enters the passage, reduce the pressure loss of the refrigerant fluid, and improve the cooling performance.

[0023] In some embodiments, the at least one first partition strip includes first ribs provided at both ends in a third direction of the first side surface, and the first ribs abut against the adjacent battery cells, and the third direction intersects the first direction.

[0024] The first ribs at both ends in the third direction of the first side surface both abut against the adjacent battery cells. The first ribs are in an interference fit with the adjacent battery cells, which can prevent the refrigerant in the first passage from leaking from both ends in the third direction of the first side surface, make all the refrigerant flow in the first passage as much as possible, and improve the cooling efficiency of the battery cells.

[0025] In some embodiments, the power storage device further includes a locking assembly provided on the partition member, and two adjacent partition members are connected via the locking assembly, and the locking assembly is arranged to support the bottom of the battery cell.

[0026] Two adjacent partition members are connected via a locking assembly and fix the battery cells in a locking manner with each other, which can improve the rigidity and safety of the power storage device and alleviate the problem of the weak structural strength of the power storage device.

[0027] In some embodiments, the power storage device further includes a first position - regulating member provided on the partition member and abutting against the top of the battery cell, and the first position - regulating member extends along the first direction and is configured in a hook shape.

[0028] The first position restricting member is configured in a hook shape and can have a certain elasticity. When attaching the battery cell, the first position restricting member can generate a certain deformation, which is advantageous for attaching the battery cell. After the attachment of the battery cell is completed, the first position restricting member recovers the deformation, has a certain abutting action on the battery cell, absorbs the assembly tolerance, is advantageous for fixing the battery cell, and prevents the battery cell from shaking.

[0029] In some embodiments, the power storage device further includes two second position restricting members provided on the partition member, and the two second position restricting members are arranged to restrict the position of the battery cell located between the two second position restricting members, and a second rib abutting against the battery cell adjacent to one of the two second position restricting members is provided.

[0030] One second position restricting member is provided on each side of the partition member. The two second position restricting members can restrict the position of the battery cell located between the two second position restricting members, fix the battery cell, prevent the battery cell from shaking, and improve the main frequency of the module.

[0031] In some embodiments, the power storage device further includes side plates provided on the sides of the at least two battery cells and extending along the first direction, and openings are provided in the side plates.

[0032] An opening is provided on the side surface of the power storage device, and the refrigerant introduced from the opening flows along a first passage partitioned by a first partition strip. The inflow direction of the refrigerant is perpendicular to the side surface of the power storage device, and the battery cell can be cooled.

[0033] In some embodiments, the opening covers at least one of the partition members along the first direction.

[0034] An opening is provided in the side plate, the opening covering at least one partition member along a first direction, the opening being aligned with a cooling passage formed on the at least one partition member to improve the cooling effect.

[0035] In some embodiments, the side plates are respectively provided on both sides of the at least two battery cells, and the first partition strip extends between the side plates on both sides of the at least two battery cells.

[0036] An opening is installed on the side surface of the power storage device, and the refrigerant introduced from the opening flows along a first passage between the first partition strips. The inflow direction of the refrigerant is perpendicular to the side surface of the power storage device, and the large surface of the battery cell can be cooled.

[0037] In some embodiments, the power storage device is provided on one side adjacent to the battery cell of the side plate and further includes a sealing material that avoids the opening.

[0038] A sealing material is installed on one side of the side plate adjacent to the battery cell to maintain an electrical gap between the side plate and the battery cell and at the same time avoid refrigerant leakage from the side plate.

[0039] In some embodiments, the power storage device further includes a side plate provided on the side of the at least two battery cells and extending along the first direction, a first plate connected to the side plate and abutting against the bottom of the locking assembly, and a second plate connected to the side plate and abutting against the top of the first position regulating member.

[0040] The side plate is provided on the side of at least two battery cells to position-regulate each battery cell from the sides of the at least two battery cells. The first plate is connected to the side plate and abuts against the bottom of the locking assembly, and can position-regulate the combination formed by the battery cell and the partition member from the bottom. The second plate is connected to the side plate and abuts against the top of the first position regulating member, and can position-regulate the combination formed by the battery cell and the partition member from the top.

[0041] In some embodiments, the locking assembly includes a third rib that abuts against the first plate.

[0042] In the process of attaching the side plate, the first plate presses the third rib and deforms the third rib. The second plate is located at the top of the battery cell and abuts against the first position restricting member. After that, the third rib recovers some of its deformation and abuts against the first plate. The third rib is interference-fitted with the first plate. By installing the third rib, the assembly tolerance in the height direction of the battery cell can be absorbed, and the battery cell terminals can be made coplanar.

[0043] In some embodiments, the power storage device further includes two butting assemblies provided on the partition member. The two butting assemblies are arranged to position-restrict the battery cell located between the two butting assemblies, and the butting assemblies on two adjacent partition members are butted against each other.

[0044] One butting assembly is provided on each side of the partition member. The two butting assemblies can cooperate to position-restrict the battery cell located between the two second position restricting members and fix the battery cell, prevent the battery cell from shaking, and improve the main frequency of the module.

[0045] In some embodiments, a fourth rib is provided that abuts against the battery cell adjacent to one of the two butting assemblies.

[0046] When installing the battery cell, one side of the battery cell presses the fourth rib and causes deformation of the fourth rib. After attaching to the butting assembly corresponding to the other side of the battery cell, the fourth rib recovers a certain amount of elastic deformation and abuts against the battery cell. The fourth rib can be used to absorb the assembly tolerance, which is beneficial for fixing the battery cell and preventing the battery cell from shaking.

[0047] In some embodiments, the power storage device further includes side plates provided on both sides of the at least two battery cells, the side plates extend along the first direction, and a fifth rib is provided on the side plate adjacent to at least one of the two butting assemblies and abuts against the side plate.

[0048] The side plate abuts against the fifth rib, absorbs assembly tolerances, is advantageous for the side plate to fix the battery cell and the partition member, and prevents the battery cell and the partition member from shaking.

[0049] Some embodiments of the present application further provide a power consumption device including the above-mentioned power storage device.

[0050] The power consumption device includes the above-mentioned power storage device and correspondingly has the beneficial effects of the power storage device.

[0051] Based on the above technical solution, the present application has at least the following beneficial effects.

[0052] In some embodiments, by the method of forming a cooling passage by partitioning with the first partition strip, after the partition member deteriorates, the first partition strip is not easily deformed, the shape and flow area of the cooling passage are not easily changed, and the problem that the cooling effect weakens due to the deterioration and deformation of the partition member is alleviated.

Brief Description of the Drawings

[0053] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on the drawings on the premise of not paying creative labor.

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Embodiments for Carrying out the Invention

[0054] Hereinafter, the embodiments of the present application will be described in more detail while associating with the drawings and examples. Hereinafter, the detailed description of the examples and the drawings are for exemplarily explaining the principle of the present application, but not for limiting the scope of the present application, that is, the present application is not limited to the described embodiments.

[0055] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of description and simplification of description in the present application, and does not indicate or imply that the device or element mentioned must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present application. It should be noted that terms such as "first", "second", "third", etc. are only used for the purpose of description and should not be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense and is within the allowable error range. "Parallel" is not parallel in the strict sense and is within the allowable error range.

[0056] In the following description, all orientation terms are the directions shown in the figures and do not limit the specific structure of the present application. In the description of the present application, it should be further noted that, unless otherwise clearly defined and limited, the terms "attachment", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. It may be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present application according to specific situations.

[0057] Currently, looking at the development trend of the market, the application of energy storage devices is becoming increasingly widespread. Energy storage devices are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of energy storage devices, the market demand is also constantly expanding.

[0058] In some related technologies, an energy storage device includes at least two battery cells, a partition plate is installed between two adjacent battery cells, and in order to position the battery cells and form a cooling passage between the battery cells and the partition plate, a part of the partition plate abuts against one of the adjacent battery cells among at least two battery cells, another part of the partition plate abuts against the other adjacent battery cell, and the part of the partition plate that does not abut against the battery cell forms a cooling passage. Therefore, the partition plate is generally a partition plate in a "bow" shape.

[0059] The inventor found that the force-receiving parts on both sides of the "bow"-shaped partition plate are asymmetric, and after the "bow"-shaped partition plate deteriorates, the force-receiving on both sides is asymmetric, so it is easy to deform, change the shape and flow area of the cooling passage, and weaken the cooling effect.

[0060] Based on this, an embodiment of the present application provides a power storage device, which includes at least two battery cells arranged in sequence along a first direction, and a partition member provided between two adjacent battery cells. The partition member includes a first side surface adjacent to one battery cell, and at least one first partition strip is provided on the first side surface. At least one first passage surrounded by the first partition strip, the first side surface and the battery cell is formed.

[0061] By the method of forming a cooling passage partitioned by the first partition strip, after the partition member deteriorates, the first partition strip is not easily deformed, the shape and flow area of the cooling passage are not easily changed, and the problem that the cooling effect weakens due to the deterioration and deformation of the partition member is alleviated.

[0062] The power storage device 100 of the present application can be used in a power consumption device, can supply electrical energy to the power consumption device, and the power consumption device may be a mobile phone, a portable device, a notebook computer, a battery vehicle, an electric vehicle, a steamship, an aircraft, an electric toy, an electric tool, etc. For example, the aircraft includes an airplane, a rocket, a space shuttle, a spaceship, etc., the electric toy includes a stationary or mobile electric toy, such as a game console, an electric vehicle toy, an electric steamship toy, an electric airplane toy, etc., and the electric tool includes a metal cutting electric tool, a polishing electric tool, an assembly electric tool, a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric driver, an electric hammer, a hammer drill, a concrete vibrator, an electric saw.

[0063] The power consumption device may further be a vehicle 200, such as a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range extender vehicle, etc., or the power consumption device may be a drone or a ship, etc.

[0064] Referring to FIG. 1, the vehicle 200 includes an axle 201, wheels 202 connected to the axle 201, a motor 203, a controller 204, and a power storage device 100. The motor 203 is used to drive the axle 202 to rotate. The controller 204 is used to control the operation of the motor 203. The power storage device 100 is installed at the bottom, head, or rear of the vehicle 200 and may be used to provide electrical energy for the operation of the motor 203 and other components in the vehicle.

[0065] Referring to FIGS. 2 to 4, the power storage device 100 includes at least two battery cells 1, a partition member 2, side plates 3, a top plate 7, and end plates 8. At least two battery cells 1 are arranged in sequence along a first direction X, and a partition member 2 is installed between two adjacent battery cells 1. The end plates 8 are provided at the ends of at least two battery cells 1 located in the first direction X. The side plates 3 are provided at the sides of at least two battery cells 1 located in a second direction Y, and the side plates 3 extend along the first direction X. The top plate 7 is provided at the top of at least two battery cells 1 located in a third direction Z.

[0066] In the present application, the first direction X coincides with the longitudinal direction of the power storage device 100. The size of the battery cell 1 along the first direction X is the thickness size of the battery cell 1. The third direction Z coincides with the height direction of the power storage device 100. Here, the height direction of the power storage device 100 is the direction between the top and the bottom. The top of the power storage device 100 is the part where the end cap is provided, and electronic terminals are provided on the end cap. The bottom of the power storage device 100 is one end opposite to the top. The size of the battery cell 1 along the third direction Z is the height size of the battery cell 1. The first direction X is perpendicular to the third direction Z, and the second direction Y is perpendicular to the plane formed by the first direction X and the third direction Z. The size of the battery cell 1 along the second direction Y is the length size of the battery cell.

[0067] Referring to FIG. 5, in some embodiments, the power storage device 100 may further include an intermediate plate 9. At least two battery cells 1 are evenly divided into two groups, and the intermediate plate 9 is provided between the two groups of battery cells 1.

[0068] Referring to FIG. 5, some embodiments provide a power storage device 100 including at least two battery cells 1 arranged in sequence along a first direction X.

[0069] Referring to FIG. 5, the power storage device 100 further includes a partition member 2 provided between two adjacent battery cells 1. Referring to FIGS. 6 to 8, the partition member 2 includes a first side surface 211 adjacent to one battery cell 1, and at least one first partition strip 21 is provided on the first side surface 211. At least one first passage 221 surrounded by the first partition strip 21, the first side surface 211, and the battery cell 1 is formed.

[0070] The partition member 2 is used to partition two adjacent battery cells 1. The first side surface 211 is one side surface of the partition member 2 adjacent to one battery cell 1. The first partition strip 21 is provided on the first side surface 211 and is used to partition the space between the first side surface 211 and the battery cell 1, and is used to form the first passage 221. The first passage 221 is a cooling passage for cooling the battery cell 1. The refrigerant passes through the first passage 221 and is used to cool the battery cell 1. That is, the partition member 2 that can provide a cooling effect between adjacent battery cells 1 is used for grouping, and a cooling passage structure through which the refrigerant can pass between the partition member 2 and the battery cell 1 is formed, and the temperature rise of the battery cell can be controlled by utilizing the flow of the refrigerant. The refrigerant here includes a gaseous refrigerant or a liquid refrigerant.

[0071] In the embodiments of the present application, by forming a cooling passage partitioned by the first partition strip 21, after the partition member 2 deteriorates, the first partition strip 21 is less likely to deform, the shape and flow area of the cooling passage are less likely to change, and the problem that the cooling effect of the power storage device 100 weakens due to the deterioration and deformation of the partition member is alleviated.

[0072] In some embodiments, the first partition strip 21 abuts against the adjacent battery cell 1.

[0073] The first partition strip 21 abuts against the adjacent battery cell 1, and the space between the partition member 2 and the battery cell 1 can be partitioned into at least two first passages 221. The temperature rise of the battery cell can be controlled by utilizing the flow of the refrigerant in the first passage 221.

[0074] In some embodiments, at least two first partition strips 21 are provided on the first side surface 211, and the at least two first partition strips 21 abut against the adjacent battery cell 1.

[0075] The at least two first partition strips 21 abut against the adjacent battery cell 1, making the force received by the heat exchange surface of the battery cell 1 uniform, avoiding the problem that the distribution of the electrolyte becomes non-uniform and the polarization increases during the cycle process of the battery cell, and improving the cycle life of the battery cell. Here, the heat exchange surface of the battery cell 1 is the surface formed by the length and height of the battery cell 1.

[0076] The distance between two adjacent first partition strips 21 is not constant and may be determined based on the size of the battery cell 1 along the first direction X, the size of the partition member 2 along the first direction X, and the distance between two adjacent battery cells 1 in the first direction X. By optimizing the distance between two adjacent first partition strips 21, the force-receiving distribution of the heat exchange surface of the battery cell 1 can be optimized, and the cooling efficiency and the cycle life of the battery cell can be improved.

[0077] Referring to FIGS. 8 and 9, in some embodiments, the first partition strip 21 includes a contact surface 213 that abuts against the battery cell 1, and the contact surface 213 is a flat surface.

[0078] The contact surface 213 where the first partition strip 21 abuts against the battery cell 1 is a flat surface, which can increase the contact area between the first partition strip 21 and the battery cell 1, make the force bearing of the heat exchange surface of the battery cell 1 uniform, and improve the cycle life of the battery cell.

[0079] Referring to FIGS. 11 and 12, in some embodiments, the partition member 2 includes a second side surface 212 adjacent to another battery cell 1, and at least one second partition strip 25 is provided on the second side surface 212, and at least one second passage 222 surrounded by the second partition strip 25, the second side surface 212 and the battery cell 1 is formed.

[0080] The second passage 222 is a cooling passage for cooling the battery cell 1. In the embodiments of the present application, by the method of forming the cooling passage partitioned by the second partition strip 25, after the partition member 2 deteriorates, the second partition strip 25 is not easily deformed, the shape and flow area of the cooling passage do not change, the cooling efficiency does not decrease, the service life of the battery cell is extended, and the problem that the partition member 2 deteriorates and deforms and the cooling efficiency decreases is alleviated.

[0081] Partition strips are provided on both the first side surface 211 and the second side surface 212 of the partition member 2, and both partition the cooling passage by the partition strips, so that heat exchange and temperature reduction can be performed on the two side surfaces of the battery cell 1, both sides of the battery cell 1 are cooled, the temperature reduction is uniform, the temperature difference between the battery cells is small, and the temperature is uniform.

[0082] The partition strips on the first side surface 211 and the second side surface 212 of the partition member 2 are not easily deformed after the partition member 2 deteriorates. The shape and flow area of the cooling passage do not change, the cooling efficiency does not decrease, the service life of the battery cell is extended, and the problem that the partition member 2 deteriorates and deforms and the cooling efficiency decreases is alleviated.

[0083] In some embodiments, the second partition strip 25 abuts against the adjacent battery cell 1.

[0084] The first partition strip 21 on the first side surface 211 of the partition member 2 abuts against the adjacent battery cell 1, and the second partition strip 25 on the second side surface 212 abuts against the adjacent battery cell 1, which can make the force received by the heat exchange surface of the battery cell 1 uniform and improve the cycle life of the battery cell.

[0085] Referring to FIG. 13, the first partition strip 21 on the first side surface 211 of the partition member 2 abuts against the adjacent battery cell 1, and the second partition strip 25 on the second side surface 212 abuts against the adjacent battery cell 1. Compared with the "bow"-shaped partition plate in the related art, this partition member 2 has a high cycle capacity retention rate of the battery cell and a significantly improved battery cell cycle life.

[0086] In some embodiments, at least two second partition strips 25 are provided on the second side surface 212, that is, a plurality of second partition strips 25 are provided on the second side surface 212. At least two first partition strips 21 are provided on the first side surface 211, that is, a plurality of first partition strips 21 are provided on the first side surface 211.

[0087] The number of the plurality of second partition strips 25 and the plurality of first partition strips 21 is the same, and each second partition strip 25 is symmetrically installed corresponding to the first partition strip 21, which can balance the force received on both sides of the partition member 2, alleviate the deterioration and deformation of the partition member 2, and improve the problem of the decrease in the air cooling efficiency caused by the deterioration and deformation of the partition member 2.

[0088] In some embodiments, at least one first passage 221 communicates with a second passage 222 in a first direction X.

[0089] The first passage 221 is located on a first side surface 211 of the partition member 2, the second passage 222 is located on a second side surface 212 of the partition member 2, and at least one first passage 221 communicates with the second passage 222 in the first direction X. That is, the cooling passage penetrates in the first direction X, reduces the fluid resistance, and can improve the cooling effect and cycle life of the battery cell 1.

[0090] In some embodiments, the number of the plurality of second partition strips 25 and the plurality of first partition strips 21 is the same, and each second partition strip 25 is symmetrically installed corresponding to the first partition strip 21. Each first passage 221 communicates with the second passage 222 in the first direction X. The partition member 2 has a hollow structure, and the refrigerant fluid flows between the first passage 221, the second passage 222, and from the first passage 221 to the second passage 222, and the cooling effect and cycle life of the battery cell 1 can be further improved.

[0091] Referring to FIGS. 15 to 18, in some other embodiments, the partition member 2 includes a second side surface 212 adjacent to another battery cell 1, and the second side surface 212 abuts against the adjacent battery cell 1.

[0092] No partition strip is installed on the second side surface 212 of the partition member 2, and the second side surface 212 directly abuts against the adjacent battery cell 1.

[0093] The partition member 2 is provided between two adjacent battery cells 1, and correspondingly, a battery cell 1 is also installed between two partition members 2. The battery cell 1 may be installed at an intermediate position between two partition members 2, or the battery cell 1 may be close to one of the two partition members 2. When the distance between two partition members 2 is constant, when the second side surface 212 of one partition member 2 abuts against the battery cell 1, the distance between the first side surface 211 of the other partition member 2 and this battery cell 1 increases. At this time, the flow area of the first passage 221 partitioned by at least one first partition strip 21 installed on the first side surface 211 increases, and the cooling efficiency is improved.

[0094] In the combined structure composed of two partition members 2 and the battery cell 1 between the two partition members 2, the installation method in which the battery cell 1 is close to one partition member 2 can expand the cross-sectional area of the cooling passage on one side and reduce the fluid resistance compared with the method in which the battery cell 1 is installed in the middle of the two partition members 2. When the lateral distance of the cooling passage is too small, the problem of too large pressure loss can be solved.

[0095] At least one first partition strip 21 is installed on the first side surface 211 of the partition member 2. The at least one first partition strip 21 abuts against the adjacent battery cell 1, and no partition strip is installed on the second side surface 212 of the partition member 2. The second side surface 212 directly abuts against the adjacent battery cell 1, that is, a cooling passage is installed on one side of the partition member 2, and the other side is in close contact with the large surface of the battery cell, increasing the force-bearing area of the battery cell 1 and alleviating the problem that the force-bearing of the battery cell 1 is uneven and the cycle life is reduced.

[0096] In the first embodiment of the partition member 2, at least one first partition strip 21 is installed on the first side surface 211 of the partition member 2, and at least one first partition strip 21 abuts against the adjacent battery cell 1. At least one second partition strip 25 is installed on the second side surface 212 of the partition member 2, and at least one second partition strip 25 abuts against the adjacent battery cell 1. In the first embodiment of the partition member 2, there are cooling passages on both sides of the partition member 2, which can cool both sides of the battery cell 1, with high cooling efficiency. Moreover, the cooling efficiency of the cooling passage will not significantly decrease with the deterioration of the partition member 2. At the same time, the partition member 2 can absorb the expansion force of the battery cell.

[0097] In the second embodiment of the partition member 2, at least one first partition strip 21 is installed on the first side surface 211 of the partition member 2, and at least one first partition strip 21 abuts against the adjacent battery cell 1. No partition strip is installed on the second side surface 212 of the partition member 2, and the second side surface 212 abuts against the adjacent battery cell 1. In the second embodiment of the partition member 2, the cross-sectional area of the cooling passage on one side is enlarged, the fluid resistance is reduced, and the cooling efficiency of the cooling passage will not significantly decrease with the deterioration of the partition member 2. At the same time, the partition member 2 can absorb the expansion force of the battery cell.

[0098] In some embodiments, the first partition strip 21 extends along a second direction Y that intersects the first direction X.

[0099] Optionally, the second direction Y is perpendicular to the first direction X.

[0100] The first partition strip 21 extends along the second direction Y. Correspondingly, the first passage 221 extends along the second direction Y, and the refrigerant flows along the first passage 221 to cool the battery cell 1, thereby improving the cooling efficiency of the battery cell 1.

[0101] In some embodiments, at least two first partition strips 21 are installed on the first side surface 211 of the partition member 2, and a plurality of first passages 221 formed by being partitioned by the plurality of first partition strips 21 are arranged in sequence on the heat exchange surface of the battery cell 1, which can improve the cooling efficiency and cooling uniformity of the battery cell 1.

[0102] In some embodiments, the second partition strip 25 extends along a second direction Y intersecting the first direction X.

[0103] Optionally, the second direction Y is perpendicular to the first direction X.

[0104] The second partition strip 25 extends along the second direction Y. Correspondingly, the second passage 222 extends along the second direction Y, and the refrigerant flows along the second passage 222 to cool the battery cell 1, which can improve the cooling efficiency of the battery cell 1.

[0105] In some embodiments, at least two second partition strips 25 are installed on the second side surface 212 of the partition member 2, and a plurality of second passages 222 formed by being partitioned by the plurality of second partition strips 25 are arranged in sequence on the heat exchange surface of the battery cell 1, which can improve the cooling efficiency and cooling uniformity of the battery cell 1.

[0106] In some embodiments, one end 214 of the first partition strip 21 is configured to intersect and connect by an inclined surface extending along the second direction Y and is formed into an angular shape that transitions in an arc shape.

[0107] In some embodiments, the other end 214 of the first partition strip 21 is configured to intersect and connect by an inclined surface extending along the reverse direction of the second direction Y and is formed into an angular shape that transitions in an arc shape.

[0108] The first partition strip 21 has two ends 214. The two ends 214 of the first partition strip 21 correspond to the inlet and outlet of the first passage 221. The ends 214 of the first partition strip 21 are configured in a corner shape that intersects and connects by an inclined surface and transitions in an arc shape, which can greatly reduce the resistance when the refrigerant enters the passage, reduce the resistance at the inlet and outlet of the first passage 221, reduce the pressure loss of the refrigerant fluid, and improve the cooling performance.

[0109] Referring to FIG. 9, in some embodiments, the ends 214 of the first partition strip 21 are in a rounded shape that intersects and connects by an inclined surface and transitions in an arc shape.

[0110] In some embodiments, one end 251 of the second partition strip 25 is configured in a corner shape that intersects and connects by an inclined surface extending along the second direction Y and transitions in an arc shape.

[0111] In some embodiments, the other end 251 of the second partition strip 25 is configured in a corner shape that intersects and connects by an inclined surface extending along the second direction Y and transitions in an arc shape.

[0112] The second partition strip 25 has two ends 251. The two ends 251 of the second partition strip 25 correspond to the inlet and outlet of the second passage 222. The ends 251 of the second partition strip 25 are configured in a corner shape that intersects and connects by an inclined surface and transitions in an arc shape, which can greatly reduce the resistance when the refrigerant enters the passage, reduce the resistance at the inlet and outlet of the second passage 222, reduce the pressure loss of the refrigerant fluid, and improve the cooling performance.

[0113] In some embodiments, the ends 251 of the second partition strip 25 are in a rounded shape that intersects and connects by an inclined surface and transitions in an arc shape.

[0114] In some embodiments, at least one first partition strip 21 includes first ribs 24 provided at both ends of the first side surface 211 in the third direction Z. The first ribs 24 abut against the adjacent battery cells 1, and the third direction Z intersects the first direction X.

[0115] Optionally, the third direction Z is perpendicular to the first direction X.

[0116] The first ribs 24 at both ends of the first side surface 211 in the third direction Z both abut against the adjacent battery cells 1. The first ribs 24 are in interference fit with the adjacent battery cells 1, which can prevent the refrigerant in the first passage 221 from leaking from both ends of the first side surface 211 in the third direction Z, making all the refrigerant flow in the first passage 221 as much as possible, and improving the cooling efficiency of the battery cells 1.

[0117] The number of the first ribs 24 provided at both ends of the first side surface 211 in the third direction Z may be one, or may be two or more.

[0118] Optionally, the first partition strips 21 all adopt the form of ribs, and the first ribs 24 are thinner than the other ribs of the first partition strips 21.

[0119] In some embodiments, at least one second partition strip 25 includes sixth ribs 26 provided at both ends of the second side surface 212 in the third direction Z. The sixth ribs 26 abut against the adjacent battery cells 1, and the third direction Z intersects the first direction X.

[0120] Optionally, the third direction Z is perpendicular to the first direction X.

[0121] The sixth ribs 26 at both ends of the second side surface 212 in the third direction Z are in contact with the adjacent battery cells 1, and the sixth ribs 26 are fitted in a press fit with the adjacent battery cells 1, so that the refrigerant in the second passage 222 can be prevented from leaking from both ends of the second side surface 212 in the third direction Z, and all the refrigerant can be made to flow in the second passage 222 as much as possible, improving the cooling efficiency of the battery cells 1.

[0122] Optionally, the second partition strips 25 all adopt the form of ribs, where the sixth rib 26 is thinner than the other ribs of the second partition strip 25.

[0123] Referring to FIGS. 7, 11 and 15, in some embodiments, the power storage device 100 further includes a locking assembly 4 provided on the partition member 2, and two adjacent partition members 2 are connected via the locking assembly 4, and the locking assembly 4 is arranged to support the bottom of the battery cell 1. Refer to FIG. 24.

[0124] The locking assembly 4 extends in the first direction X with respect to the partition member 2 or extends in a direction opposite to the first direction.

[0125] Two adjacent partition members 2 are connected via the locking assembly 4 and fix the battery cell 1 in a manner of locking with each other, improving the rigidity and safety of the power storage device 100 and alleviating the problem that the structural strength of the power storage device 100 is weak.

[0126] Between two adjacent partition members 2, they are in a form locked by the locking assembly 4, which can not only realize assembly foolproof and assembly guides, but also restrict each other between the partition members 2, improve the rigidity of the power storage device 100, and guarantee the structural strength of the power storage device 100.

[0127] In some embodiments, the locking assembly 4 includes a bump and groove structure installed at the bottom of the first side surface 211 of the partition member 2, and a bump and groove structure installed at the bottom of the second side surface 212 of the partition member 2. The position where the bump is installed at the bottom of the first side surface 211 of the partition member 2 corresponds to the position where the groove is installed at the bottom of the second side surface 212 of the partition member 2, and the position where the groove is installed at the bottom of the first side surface 211 of the partition member 2 corresponds to the position where the bump is installed at the bottom of the second side surface 212 of the partition member 2.

[0128] In two adjacent partition members 2, the bump installed at the bottom of the first side surface 211 of one partition member 2 is correspondingly fitted and locked with the groove installed at the bottom of the second side surface 212 of the other partition member 2, and the groove installed at the bottom of the first side surface 211 of one partition member 2 is correspondingly fitted and locked with the bump installed at the bottom of the second side surface 212 of the other partition member 2. The form of fitting and locking between the bump and the groove includes the insertion of the bump into the groove.

[0129] In some embodiments, the groove may be replaced by a notch.

[0130] Referring to FIGS. 19 and 20, the locking assembly 4 includes a bump 43 provided at the middle position of the bottom of the first side surface 211 and a notch 42 provided at the middle position of the bottom of the second side surface 212.

[0131] In two adjacent partition members 2, the bump 43 installed at the bottom of the first side surface 211 of one partition member 2 is inserted corresponding to the notch 42 installed at the bottom of the second side surface 212 of the other partition member 2, and the bump 43 and the notch 42 are fitted and locked with each other.

[0132] The locking assembly 4 further includes a second locking portion 45 and a fourth locking portion 47 provided at the bottom of the first side surface 211, and a first locking portion 44 and a third locking portion 46 provided at the bottom of the second side surface 212. A concave groove is provided in the second locking portion 45, and a bump is provided in the corresponding first locking portion 44. The second locking portion 45 of one partition member 2 and the first locking portion 44 of another partition member 2 are fitted and locked to each other. A bump is provided in the fourth locking portion 47, and a concave groove is provided in the third locking portion 46. The fourth locking portion 47 of one partition member 2 and the third locking portion 46 of another partition member 2 are fitted and locked to each other.

[0133] In some embodiments, the power storage device 100 further includes a position regulation assembly 5 including a first position regulation member 51.

[0134] In some embodiments, the first position regulation member 51 is provided on the partition member 2 and abuts against the top of the battery cell 1. The first position regulation member 51 extends along the first direction X and is configured in a hook shape.

[0135] The first position regulation member 51 is hook-shaped, indicating that its contour line includes a curve and is not a single straight line.

[0136] Referring to FIGS. 11, 15 and 21, two adjacent partition members 2 are connected via a locking assembly 4. The locking assembly 4 is arranged to support the bottom of the battery cell 1. This fitting part is the bottom fitting part a2. The first position regulation member 51 is provided at the top of the battery cell 1 and abuts against the top of the battery cell 1. This fitting part is the top fitting part a1. The top fitting part a1 is fitted with the bottom fitting part a2 to position the top and bottom of the battery cell 1 and prevent the battery cell 1 from shaking.

[0137] The first position restricting member 51 is configured in a hook shape, and the first position restricting member 51 can be given a certain elasticity. When attaching the battery cell 1, the first position restricting member 51 can generate a certain deformation, which is advantageous for attaching the battery cell 1. After the attachment of the battery cell 1 is completed, the first position restricting member 51 recovers the deformation, has a certain abutting action on the battery cell 1, absorbs the assembly tolerance, is advantageous for fixing the battery cell 1, and prevents the battery cell 1 from shaking.

[0138] Referring to FIGS. 12 and 16, in some embodiments, the position restricting assembly 5 further includes a second position restricting member 52.

[0139] In some embodiments, the power storage device 100 further includes two second position restricting members 52 provided on the partition member 2. The two second position restricting members 52 are arranged to restrict the position of the battery cell 1 located between the two second position restricting members 52, and a second rib 521 is provided that abuts against the battery cell 1 adjacent to one of the second position restricting members 52.

[0140] One second position restricting member 52 is provided on each side of the partition member 2. The two second position restricting members 52 cooperate to restrict the position of the battery cell 1 located between the two second position restricting members 52, can fix the battery cell 1, prevent the battery cell 1 from shaking, and improve the main frequency of the module.

[0141] A second rib 521 is provided on one of the two second position restricting members 52. For example, the second rib 521 is provided on the left second position restricting member 52 shown in FIG. 21. When attaching the battery cell 1, one side of the battery cell 1 presses the second rib 521, causing deformation in the second rib 521. After attaching the second position restricting member 52 corresponding to the other side of the battery cell 1, the second rib 521 recovers a certain elastic deformation, abuts against the battery cell 1, and can utilize the second rib 521 to absorb the assembly tolerance, which is advantageous for fixing the battery cell 1 and prevents the battery cell 1 from shaking.

[0142] Referring to FIG. 21, the contact portions between the two second position restricting members 52 and the battery cell 1 respectively correspond to the first side fitting portion b1 and the second side fitting portion b2. The first side fitting portion b1 and the second side fitting portion b2 fit together to restrict the sides of the battery cell 1, prevent the battery cell 1 from shaking, and improve the rigidity of the module.

[0143] Referring to FIGS. 8 and 9, in some embodiments, the two second position restricting members 52 are provided on the upper part of the partition member 2. A second rib 521 is provided on one side of one second position restricting member 52 adjacent to the battery cell 1. The second rib 521 may be connected to the first rib 24 on the upper part of the first side surface 211. The second rib 521 can absorb the tolerance during the assembly of the battery cell 1, and fit with the first rib 24 to prevent the refrigerant from leaking from the cooling passage.

[0144] In some embodiments, one side of the second position restricting member 52 away from the battery cell 1 is configured as a concave groove structure that can be filled with the sealing material 10.

[0145] Referring to FIG. 2, in some embodiments, the power storage device 100 further includes a side plate 3 provided on the sides of at least two battery cells 1 and extending along the first direction X, and an opening 31 is provided in the side plate 3.

[0146] An opening 31 is provided on the side surface of the power storage device 100. The refrigerant introduced from the opening 31 flows along the first passage 221 partitioned by the first partition strip 21. The inflow direction of the refrigerant is perpendicular to the side surface of the power storage device 100, and can cool the battery cell.

[0147] In some embodiments, the opening 31 covers at least one partition member 2 along the first direction X.

[0148] An opening 31 is provided in the side plate 3. The opening 31 covers at least one partition member 2 along the first direction X. The opening 31 is aligned with a cooling passage formed on at least one partition member 2 to improve the cooling effect.

[0149] In some embodiments, the opening 31 covers at least two partition members 2 along the first direction X. The opening 31 is large enough to cover the cooling passages formed on at least two partition members 2, increasing the flow area of the refrigerant, reducing the requirements for manufacturing tolerances, preventing the problem that the opening 31 is not aligned with the cooling passage due to manufacturing tolerances, and improving the cooling effect.

[0150] In some embodiments, side plates 3 are respectively provided on both sides of at least two battery cells 1, and the first partition strip 21 extends between the side plates 3 on both sides of at least two battery cells 1.

[0151] An opening 31 is installed on the side surface of the power storage device 100. The refrigerant introduced from the opening 31 flows along the first passage 221 between the first partition strips 21. The inflow direction of the refrigerant is perpendicular to the side surface of the power storage device 100, and the large surface of the battery cell can be cooled.

[0152] Also, compared with the bottom intake method, the side intake method has a shorter intake path, reduces wind resistance, decreases pressure loss, and has a higher cooling effect.

[0153] Referring to FIG. 4, in some embodiments, the side plate 3 includes a first beam 32 and a plurality of second beams 33.

[0154] The first beam 32 extends along the first direction X. The plurality of second beams 33 are alternately connected to the first beam 32 to form a plurality of openings 31.

[0155] The side plate 3 includes a first beam 32 and a plurality of second beams 33 that are alternately connected to the first beam 32, increasing the overall strength of the module.

[0156] In some embodiments, the first beam 32 extends from the front end to the rear end of the power storage device 100. This structure satisfies the module strength requirements, reduces the number of the second beams 33, reduces the requirements for the lateral tolerance of the module, and at the same time reduces the weight of the module and the manufacturing cost.

[0157] The opening 31 is formed by alternately connecting the first beam 32 and the second beam 33. The flow guiding direction of the opening 31 is perpendicular to the side surface of the power storage device 100, and the battery cells can be effectively cooled.

[0158] The opening 31 is formed by alternately connecting the first beam 32 and the second beam 33. The first beam 32 extends from the front end to the rear end of the power storage device 100. This structure satisfies the module strength requirements, reduces the number of the second beams 33, covers at least two first partition strips 21 on the opening 31, has a large refrigerant inflow area of the cooling passage, and improves the cooling effect of the battery cells.

[0159] In some embodiments, the power storage device 100 is provided on one side adjacent to the battery cells 1 of the side plate 3 and further includes a sealing material 10 that avoids the opening 31.

[0160] The sealing material 10 is installed on one side adjacent to the battery cells 1 of the side plate 3 to maintain the electrical gap between the side plate 3 and the battery cells 1 and at the same time avoid the refrigerant leakage of the side plate 3.

[0161] In some embodiments, the sealing material 10 includes a foam. Optionally, the foam includes a silicone rubber foam.

[0162] Referring to FIG. 22, in some embodiments, the power storage device 100 further includes a side plate 3, a first plate 34, and a second plate 35.

[0163] The side plate 3 is provided on the sides of at least two battery cells 1 and extends along the first direction X. The first plate 34 is connected to the side plate 3 and abuts against the bottom of the locking assembly 4. The second plate 35 is connected to the side plate 3 and abuts against the top of the first position restricting member 51.

[0164] The side plate 3 is provided on the sides of at least two battery cells 1, restricts the positions of the respective battery cells 1 from the sides of the at least two battery cells 1. The first plate 34 is connected to the side plate 3 and abuts against the bottom of the locking assembly 4, and can restrict the position of the combination formed by the battery cell 1 and the partition member 2 from the bottom. The second plate 35 is connected to the side plate 3 and abuts against the top of the first position restricting member 51, and can restrict the position of the combination formed by the battery cell 1 and the partition member 2 from the top.

[0165] In some embodiments, the position restricting assembly 5 further includes a third position restricting member 53. The third position restricting member 53 is connected to the first position restricting member 51 and extends along the second direction Y. The power storage device 100 further includes a third plate 36. The third plate 36 is connected to the second plate 35 and extends along the second direction Y. After the attachment of the side plate 3 is completed, the third plate 36 abuts against the third position restricting member 53.

[0166] Referring to FIGS. 22 and 23, in some embodiments, the locking assembly 4 includes a third rib 41 that abuts against the first plate 34.

[0167] The side plate 3 is provided on the sides of at least two battery cells 1, positions the battery cells 1 from the sides of at least two battery cells 1, the first plate 34 is connected to the side plate 3 and abuts against the bottom of the locking assembly 4, the locking assembly 4 includes a third rib 41, and in the process of attaching the side plate, the first plate 34 presses the third rib 41 to deform the third rib 41. The second plate 35 is located at the top of the battery cell 1 and abuts against the first position restricting member 51. After that, a part of the deformation of the third rib 41 is restored and abuts against the first plate 34. The third rib 41 is in interference fit with the first plate 34. By providing the third rib 41, the assembly tolerance in the height direction of the battery cell can be absorbed, and the terminal posts of the battery cells can be made coplanar.

[0168] In some embodiments, the power storage device 100 further includes two butting assemblies 6 provided on the partition member 2. The two butting assemblies 6 are arranged to position the battery cell 1 located between the two butting assemblies 6, and the butting assemblies 6 on two adjacent partition members 2 are butted against each other.

[0169] One butting assembly 6 is provided on each side of the partition member 2. The two butting assemblies 6 cooperate to position the battery cell 1 located between the two second position restricting members 52, and the battery cell 1 can be fixed, the swaying of the battery cell 1 can be prevented, and the main frequency of the module can be improved.

[0170] In some embodiments, a fourth rib 63 is provided which abuts against the battery cell 1 adjacent to one of the two butting assemblies 6.

[0171] A fourth rib 63 is provided on one of the two butting assemblies 6, for example, on the left butting assembly 6 shown in FIG. 21. When the battery cell 1 is attached, one side of the battery cell 1 presses against the fourth rib 63, causing deformation of the fourth rib 63. After the butting assembly 6 corresponding to the other side of the battery cell 1 is attached, the fourth rib 63 recovers a certain elastic deformation and abuts against the battery cell 1. The fourth rib 63 can be used to absorb assembly tolerances, which is beneficial for fixing the battery cell 1 and preventing the battery cell 1 from shaking.

[0172] Referring to FIG. 21, the contact locations between the two butting assemblies 6 and the battery cell 1 respectively correspond to a third lateral fitting portion d1 and a fourth lateral fitting portion d2. The third lateral fitting portion d1 and the fourth lateral fitting portion d2 fit with each other to restrict the lateral position of the battery cell 1, prevent the battery cell 1 from shaking, and improve the rigidity of the module.

[0173] Between the top and bottom of the battery cell 1, they are fitted and position-restricted by a top fitting portion a1 and a bottom fitting portion a2. Between the two side portions of the battery cell 1, they are fitted and position-restricted by a first lateral fitting portion b1, a second lateral fitting portion b2, a third lateral fitting portion d1, and a fourth lateral fitting portion d2. That is, it is beneficial for the assembly guide and foolproof design between the battery cell 1 and the partition member 2, easy to install, accelerates the production rhythm, and can also position the assembly of the battery cell 1 within the partition member 2, without shaking, and improves the rigidity of the module.

[0174] The first position restricting member 51 is configured in a hook shape, has elasticity, is deformable, and can improve the assembly robustness of the battery cell 1 from the top and bottom directions of the battery cell 1. The second rib 521 and the fourth rib 63 both have elasticity and can be deformed, and can improve the assembly robustness of the battery cell from both sides of the battery cell 1. The fitting of the first position restricting member 51, the second rib 521, and the fourth rib 63 can absorb the tolerances in the length, thickness, and height directions of the battery cell 1, absorb the expansion force of the battery cell, and can alleviate the problem of refrigerant leakage of the partition member 2.

[0175] Referring to FIGS. 8 and 10, in some embodiments, two butting assemblies 6 are provided at the lower part of the partition member 2. A fourth rib 63 is provided on one side adjacent to the battery cell 1 of one butting assembly 6. The fourth rib 63 may be connected to the first rib 24 provided at the lower part of the first side surface 211. The fourth rib 63 can absorb the tolerance when assembling the battery cell 1, and can fit with the first rib 24 to prevent the refrigerant from leaking from the cooling passage.

[0176] Referring to FIGS. 22 and 23, in some embodiments, the power storage device 100 further includes side plates 3 provided on both sides of at least two battery cells 1. The side plates 3 extend along the first direction X, and a fifth rib 64 is provided on the side plate 3 that abuts against at least one of the two butting assemblies 6.

[0177] The side plate 3 abuts against the fifth rib 64, absorbs the assembly tolerance, is advantageous for the side plate 3 to fix the battery cell 1 and the partition member 2, and prevents the battery cell 1 and the partition member 2 from shaking.

[0178] Referring to FIGS. 6, 7, 11 and 15, in some embodiments, the butting assembly 6 includes a first butting member 61 and a second butting member 62. The first butting member 61 is provided on the top of the second butting member 62. The fourth rib 63 is provided on one side adjacent to the battery cell 1 of the first butting member 61, and the fifth rib 64 is provided on one side adjacent to the side plate 3 of the second butting member 62.

[0179] The first butting member 61 and the second butting member 62 have overlapping portions and misaligned portions in the first direction X. In two adjacent partition members 2, the first butting member 61 of one partition member 2 abuts against the first butting member 61 of the other partition member 2, and the second butting member 62 of one partition member 2 abuts against the second butting member 62 of the other partition member 2.

[0180] Some embodiments further provide a power consumption device including the power storage device 100 in any of the above embodiments.

[0181] The power consumption device may be a vehicle 200, for example, a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range extender vehicle, etc. Or the power consumption device may be a drone or a steamship, etc.

[0182] Referring to FIG. 1, in some embodiments, the vehicle 200 includes an axle 201, wheels 202 connected to the axle 201, a motor 203, a controller 204, and a power storage device 100. The motor 203 is used to drive the axle 202 to rotate. The controller 204 is used to control the operation of the motor 203. The power storage device 100 may be installed at the bottom, head or rear of the vehicle 200 and used to provide electrical energy for the operation of the motor 203 and other components in the vehicle.

[0183] The power consumption device according to an embodiment of the present application includes the power storage device 100 in any of the above embodiments, and correspondingly has the beneficial effects of the power storage device 100, which will not be described further herein.

[0184] In a preferred or alternative embodiment, the power storage device 100 includes a battery cell 1, a partition member 2, a side plate 3, a locking assembly 4, a position regulating assembly 5, a butting assembly 6, and a sealing material 10. The battery cell 1 is located between two adjacent partition members 2. The partition member 2 includes a first side surface 211 adjacent to one battery cell 1 and a second side surface 212 adjacent to another battery cell 1. A first partition strip 21 is installed on the first side surface 211 of the partition member 2, and a second partition strip 25 is installed on the second side surface 212 of the partition member 2. Cooling passages are formed between both sides of the battery cell 1 and the adjacent partition members 2. Alternatively, a first partition strip 21 is installed on the first side surface 211 of the partition member 2, the second side surface 212 of the partition member 2 is a flat surface, one side of the battery cell 1 abuts against the second side surface 212 of one partition member 2, and a cooling passage is formed between the other side of the battery cell 1 and the first side surface 211 of another partition member 2. The side plate 3 is provided on the side of the battery cell 1. The side plate 3 includes a first beam 32 and a plurality of second beams 33. The plurality of second beams 33 are alternately connected to the first beam 32 to form a plurality of openings 31, and the openings 31 communicate with the corresponding cooling passages. The locking assembly 4 is provided at the bottom of the partition member 2. Two adjacent partition members 2 are connected via the locking assembly 4, and the locking assembly 4 is used to support the bottom of the battery cell 1. The position regulating assembly 5 is provided at the top and both upper sides of the partition member 2, and the position regulating assembly 5 is used to regulate the positions of the top and both upper sides of the battery cell 1. The butting assembly 6 is provided at both lower sides of the partition member 2, and the butting assembly 6 is used to regulate the positions of both lower sides of the battery cell 1. The sealing material 10 is provided on one side of the side plate 3 adjacent to the battery cell 1 and avoids the openings 31.

[0185] The present application has been described with reference to the preferred embodiments, but various improvements can be made thereto and the members thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions within the scope of the claims.

Explanation of Reference Signs

[0186] 1: Battery cell, 2: Partition member, 21: First partition strip, 211: First side surface, 212: Second side surface, 213: Contact surface, 214: End of the first partition strip, 221: First passage, 222: Second passage, 23: Frame, 24: First rib, 25: Second partition strip, 251: End of the second partition strip, 26: Sixth rib, 3: Side plate, 31: Opening, 32: First beam, 33: Second beam, 34: First plate, 35: Second plate, 36: Third plate, 4: Locking assembly, 41: Third rib, 42: Notch, 43: Bump, 44: First locking portion, 45: Second locking portion, 46: Third locking portion, 47: Fourth locking portion, 5: Position regulating assembly, 51: First position regulating member, 52: Second position regulating member, 521: Second rib, 53: Third position regulating member, 6: Butting assembly, 61: First butting member, 62: Second butting member, 63: Fourth rib, 64: Fifth rib, 7: Top plate, 8: End plate, 9: Intermediate plate, 10: Sealing material, 100: Power storage device, 200: Vehicle, 201: Axle, 202: Wheel, 203: Motor, 204: Controller, X: First direction, Y: Second direction, Z: Third direction.

Claims

1. A power storage device, comprising: at least two battery cells (1) arranged in sequence along a first direction (X); a partition member (2) provided between two adjacent battery cells (1); wherein the partition member (2) includes a first side surface (211) adjacent to one of the at least two battery cells (1), at least one first partition strip (21) is provided on the first side surface (211), and at least one first passage (221) surrounded by the first partition strip (21), the first side surface (211) and the battery cell (1) is formed. A power storage device.

2. The power storage device according to claim 1, wherein the first partition strip (21) abuts against the adjacent battery cell (1).

3. The power storage device according to claim 2, wherein the first partition strip (21) includes a contact surface (213) that abuts against the battery cell (1), and the contact surface (213) is a flat surface.

4. The partition member (2) includes a second side surface (212) adjacent to the other one of the at least two battery cells (1), at least one second partition strip (25) is provided on the second side surface (212), and at least one second passage (222) surrounded by the second partition strip (25), the second side surface (212) and the battery cell (1) is formed. The power storage device according to any one of claims 1 to 3.

5. The power storage device according to claim 4, wherein the second partition strip (25) abuts against the adjacent battery cell (1).

6. The power storage device according to claim 4 or 5, wherein at least one of the first passages (221) communicates with the second passage (222) in the first direction (X).

7. The partition member (2) includes a second side surface (212) adjacent to the other one of the at least two battery cells (1), and the second side surface (212) abuts against the adjacent battery cell (1). The power storage device according to any one of claims 1 to 6.

8. The power storage device according to any one of claims 1 to 7, wherein the first partition strip (21) extends along a second direction (Y), and the second direction (Y) intersects the first direction (X).

9. The power storage device according to claim 8, wherein one end portion (214) of the first partition strip (21) is cross-connected by an inclined surface extending along the second direction (Y) and is configured in a rectangular shape that transitions in an arc shape.

10. The at least one first partition strip (21) includes first ribs (24) provided at both end portions in the third direction (Z) of the first side surface (211), and the first ribs (24) abut against the adjacent battery cells (1), and the third direction (Z) intersects the first direction (X). The power storage device according to any one of claims 1 to 9.

11. The power storage device according to any one of claims 1 to 10, further including a locking assembly (4) provided on the partition member (2), and two adjacent partition members (2) are connected via the locking assembly (4), and the locking assembly (4) is arranged to support the bottom of the battery cell (1).

12. The power storage device according to any one of claims 1 to 11, further including a first position restricting member (51) provided on the partition member (2) and abutting against the top of the battery cell (1), and the first position restricting member (51) extends along the first direction (X) and is configured in a hook shape.

13. The power storage device according to any one of claims 1 to 12, further including two second position restricting members (52) provided on the partition member (2), and the two second position restricting members (52) are arranged to restrict the position of the battery cell (1) located between the two second position restricting members (52), and a second rib (521) abutting against the battery cell (1) adjacent to one of the two second position restricting members (52) is provided.

14. The power storage device according to any one of claims 1 to 13, further including a side plate (3) provided on the side portions of the at least two battery cells (1) and extending along the first direction (X), and an opening (31) is provided in the side plate (3).

15. The power storage device according to claim 14, wherein the opening (31) covers at least one of the partition members (2) along the first direction (X).

16. The side plates (3) are respectively provided on both sides of the at least two battery cells (1), and the first partition strip (21) extends between the side plates (3) on both sides of the at least two battery cells (1). The power storage device according to claim 14 or 15.

17. The power storage device according to any one of claims 14 to 16, further comprising a sealing material (10) provided on one side of the side plate (3) adjacent to the battery cell (1) and avoiding the opening (31).

18. Side plates (3) provided on the sides of the at least two battery cells (1) and extending along the first direction (X), A first plate (34) connected to the side plate (3) and abutting against the bottom of the locking assembly (4), A second plate (35) connected to the side plate (3) and abutting against the top of the first position restricting member (51), The power storage device according to claim 12, further comprising.

19. The power storage device according to claim 18, wherein the locking assembly (4) includes a third rib (41) abutting against the first plate (34).

20. The power storage device according to any one of claims 1 to 19, further comprising two butting assemblies (6) provided on the partitioning member (2), the two butting assemblies (6) being arranged to position-restrict the battery cell (1) located between the two butting assemblies (6), and the butting assemblies (6) on two adjacent partitioning members (2) being butted together.

21. The power storage device according to claim 20, wherein a fourth rib (63) abutting against the battery cell (1) adjacent to one of the two butting assemblies (6) is provided.

22. The power storage device according to claim 20 or 21, further comprising side plates (3) provided on both sides of the at least two battery cells (1), the side plates (3) extending along the first direction (X), and a fifth rib (64) abutting against the side plate (3) adjacent to at least one of the two butting assemblies (6) being provided.

23. A power consumption device, comprising the power storage device according to any one of claims 1 to 22.

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