Battery and electric device

Abstract

Disclosed in the present application are a battery and an electric device, which belong to the technical field of batteries. The battery of the present application comprises: a battery cell comprising a housing and an electrode terminal, the electrode terminal being arranged in the housing; a case assembly comprising a case, the case comprising a body part and a partition part, an accommodating space being formed inside the body part, the partition part being located in the accommodating space and dividing the accommodating space into two first accommodating cavities, the two first accommodating cavities respectively extending through surfaces of the body part in opposite directions and respectively forming openings on the surfaces of the body part, and at least one battery cell being arranged in each first accommodating cavity. Two first accommodating cavities are arranged in the box body, a battery cell can be placed in each first accommodating cavity, and the electrode terminal is located on the side of the housing facing away from the partition part. When there are a plurality of battery cells, the plurality of battery cells can be attached to each other, so that the space in the first accommodating cavity is more fully utilized, thereby improving the volumetric energy density of the battery.

Description

Battery and electric device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application 202410902654.7, filed on July 5, 2024, entitled “Battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0004] The space utilization rate of battery cells in a battery affects the volumetric energy density of the battery, and how to improve the space utilization rate of battery cells has become a technical problem to be solved. SUMMARY

[0005] In view of the above problems, the present application provides a battery and an electric device, which can improve the space utilization rate of battery cells.

[0006] In a first aspect, the present application provides a battery, comprising:

[0007] A battery cell comprising a shell and an electrode terminal, the electrode terminal being arranged in the shell;

[0008] A box assembly comprising a box, the box comprising a body portion and a partition portion, an accommodation space being formed in the interior of the body portion, the partition portion being located in the accommodation space and separating the accommodation space into two first accommodation cavities, the two first accommodation cavities penetrating through the surface of the body portion in a direction away from each other and respectively forming an opening on the surface of the body portion, at least one battery cell being arranged in each first accommodation cavity, and the electrode terminal of the battery cell being arranged towards the side wall of the first accommodation cavity or towards the opening.

[0009] The battery cells in the two first accommodation cavities are arranged in the box from the same side, and when the electrode terminals of the battery cells arranged in layers are away from each other, the battery cells in the bottom layer are limited by the bottom wall of the box, which makes it difficult to electrically connect the battery cells, and the battery cells need to be insulated towards the bottom wall of the box, which makes the structure of the battery complex and the space utilization rate of the box low. By arranging two first accommodation cavities in the box, battery cells can be arranged in each first accommodation cavity, and the electrode terminal of the battery cell is arranged towards the side wall of the first accommodation cavity or towards the opening, which facilitates the electrical connection between the battery cells in each first accommodation cavity, so that the battery cells in the same first accommodation cavity form a group in series, parallel or mixed connection, simplifying the structure inside the box and improving the space utilization rate in the box to improve the volumetric energy density of the battery.

[0010] In some embodiments, the partition includes a partition plate, and the body includes:

[0011] The frame is arranged around the edge of the partition, the inner wall of the frame forms the containing space, and the frame is connected with the partition.

[0012] Compared with the case where only one first containing cavity is arranged and the box body has a bottom wall, the arrangement of the frame eliminates the structure of the bottom wall of the box body, and the partition divides the containing space into two first containing cavities, so that the battery monomers can be loaded from both sides of the box body to fully utilize the space of the box body, and when the battery monomers are multiple, the electrical connection between the multiple battery monomers is facilitated.

[0013] In some embodiments, the battery monomer further includes a pressure relief mechanism, the pressure relief mechanism is arranged towards the side wall of the first containing cavity or towards the opening, and the pressure relief mechanism is configured to release the internal pressure of the battery monomer when the internal pressure or temperature of the battery monomer reaches a threshold value.

[0014] When the battery monomer is in thermal runaway, the pressure relief mechanism is arranged towards the side wall of the first containing cavity or towards the opening, so that the gas in thermal runaway can be sprayed in different directions. Compared with the case where the pressure relief mechanism is arranged towards the partition, the influence of the battery monomers in the two first containing cavities can be reduced when the battery monomer is in thermal runaway, so as to improve the safety of the battery.

[0015] In some embodiments, the electrode terminal of the battery monomer and / or the pressure relief mechanism is arranged towards the side wall of the first containing cavity; and the battery monomer is fixedly connected with the partition.

[0016] When the electrode terminal of the battery monomer is arranged towards the side wall of the first containing cavity, the electrical connection of the electrode terminal is facilitated. When the pressure relief mechanism of the battery monomer is arranged towards the side wall of the first containing cavity, the gas in thermal runaway can be sprayed in different directions. Compared with the case where the pressure relief mechanism is arranged towards the partition, the influence of the battery monomers in the two first containing cavities can be reduced when the battery monomer is in thermal runaway, so as to improve the safety of the battery. When the electrode terminal and the pressure relief mechanism of the battery monomer are arranged towards the side wall of the first containing cavity, both the above-mentioned effects are taken into account. The fixed connection of the battery monomer with the partition can limit the movement of the battery monomer in the height direction of the body, especially when the battery monomers are multiple, the electrode terminals of the multiple battery monomers are electrically connected in series, parallel or mixed connection, and the fixed connection of the battery monomer with the partition can reduce the probability of misalignment of the multiple battery monomers, so as to improve the reliability of the electrical connection.

[0017] In some embodiments, the electrode terminal of the battery monomer and / or the pressure relief mechanism is arranged towards the opening of the first containing cavity; and the battery monomer is fixedly connected with the partition.

[0018] When the electrode terminal of the battery cell is arranged towards the opening of the first accommodating cavity, compared with the way that the electrode terminal is arranged towards the side wall of the first accommodating cavity (when the battery cell is arranged towards the side wall, the electrode terminal needs to keep a certain distance from the side wall), the distance between the battery cell and the side wall of the first accommodating cavity can be reduced, so that more battery cells can be placed, thereby improving the space utilization of the first accommodating cavity. When the pressure relief mechanism is arranged towards the opening of the first accommodating cavity, the gas of thermal runaway can be sprayed in different directions, compared with the way that the pressure relief mechanism is arranged towards the partition, when the battery cell is in thermal runaway, the influence of the battery cells in the two first accommodating cavities can be reduced, thereby improving the safety of the battery. When the electrode terminal of the battery cell and the pressure relief mechanism are arranged towards the opening of the first accommodating cavity, both of the above two effects are taken into account. The battery cell is fixedly connected with the partition, so that the movement of the battery cell along the height direction of the body part is limited, especially when the battery cell is multiple, the electrode terminals of the multiple battery cells are electrically connected in series, parallel or mixed connection, the battery cell is fixedly connected with the partition, so that the probability of dislocation of the multiple battery cells is reduced, thereby improving the reliability of the electrical connection.

[0019] In some embodiments, the battery further comprises a limiting piece, the limiting piece is located on the side of the battery cell away from the partition, the limiting piece is connected with the box body, and the limiting piece is used to limit the movement of the battery cell along the height direction of the body part. Along the height direction, the projections of the limiting piece on the battery cell are arranged out of position with the pressure relief mechanism and the electrode terminal, respectively.

[0020] When the battery cell supplies power to the power supply component, if the battery cell moves relative to the box body, it is easy to cause the electrical connection between the battery cell and the power supply component to fail. The limiting piece is arranged to limit the movement of the battery cell along the height direction of the body part, so that the battery cell can be more firmly fixed in the box body, thereby improving the reliability of the electrical connection of the electrode terminal of the battery cell.

[0021] In some embodiments, in the same first accommodating cavity, the number of battery cells is multiple, the multiple battery cells are arranged along a first direction, the limiting piece extends along the first direction, and the limiting piece is used to limit the movement of the multiple battery cells along the height direction of the body part. The first direction intersects the height direction.

[0022] In this way, one limiting piece can be used to limit the movement of the multiple battery cells arranged along the first direction, compared with the way that each battery cell is limited by one limiting piece, not only the number of limiting pieces can be saved, but also the space occupied by the limiting pieces in the box body where the battery cells are located can be reduced, thereby improving the space utilization.

[0023] In some embodiments, the plurality of battery cells arranged along the first direction is a group, the battery cells are multiple groups, the multiple groups of battery cells are arranged along a second direction, the number of the limiting members is at least three, the multiple limiting members are arranged along the second direction, the same group of battery cells is limited to move along the height direction by two limiting members, and the second direction intersects the first direction and the height direction respectively.

[0024] Compared with the mode that each battery cell is limited by one limiting member, the battery cells are multiple groups, and the same group of battery cells is limited to move along the height direction by two limiting members, not only the structure can be simplified, but also the space occupied by the limiting members in the battery cell box is reduced, so as to improve the space utilization.

[0025] In some embodiments, the two adjacent groups of battery cells are limited to move along the height direction by the same limiting member.

[0026] Compared with the structure that the two adjacent groups of battery cells are limited by four limiting members, the number of limiting members used can be further saved, so as to reduce the space occupied by the limiting members in the battery cell box, so as to improve the space utilization.

[0027] In some embodiments, the battery further comprises a heat management assembly, the heat management assembly comprises a heat exchange plate, each first accommodating cavity is provided with a heat exchange plate, and the heat exchange plate is in thermal conductive connection with the first outer wall surface of the shell.

[0028] Since excessively high temperature and excessively low temperature can damage the chemical reaction in the battery during the charging and discharging process of the battery, affect the service life of the battery, and high temperature is easy to cause thermal runaway of the battery, the heat exchange plate can adjust the temperature of the battery cell, so as to improve the heat dissipation and the situation of excessively low temperature of the battery, thereby improving the service life and safety of the battery.

[0029] In some embodiments, the number of heat exchange plates in the same first accommodating cavity is multiple, the multiple heat exchange plates are arranged at intervals along the first direction, a plurality of battery cells arranged along a second direction are arranged between the adjacent two heat exchange plates, the thickness direction of each heat exchange plate is the first direction, and the first direction intersects the height direction of the body part.

[0030] In this way, the contact area of the heat exchange plate and the battery cell can be increased, the heat exchange efficiency can be improved, the heat dissipation and the situation of excessively low temperature of the battery can be improved, and the service life and safety of the battery can be improved.

[0031] In some embodiments, a plurality of battery cells arranged along a second direction are arranged between the adjacent two heat exchange plates, and the second direction intersects the first direction and the height direction of the body part respectively. Alternatively, the battery cells between the adjacent two heat exchange plates are multiple rows, the multiple rows of battery cells are arranged along the first direction, the number of battery cells in each row is multiple, the battery cells in the same row are arranged along the second direction, and the second direction intersects the first direction and the height direction of the body part respectively.

[0032] Thus, the heat exchange plate can adjust the temperature of the plurality of battery monomers, and the plurality of battery monomers are integrated in the first accommodating cavity, the plurality of battery monomers of the two first accommodating cavities are arranged in layers, and the two first accommodating cavities separate the two layers of battery monomers, so that the battery monomers in each layer and the battery monomers can be electrically connected on one side of the opening, so that the space in the box is fully utilized, and the box can have greater capacity in limited space.

[0033] In some embodiments, the first outer wall surface is the wall surface with the largest surface area outside the battery monomer.

[0034] Thus, compared with the heat conduction connection mode of the heat exchange plate and other wall surfaces of the battery monomer, the heat exchange area of the heat exchange plate and the battery monomer can be increased to improve the heat dissipation of the battery and the case of too low temperature.

[0035] In some embodiments, the heat exchange plate is provided with a flow channel inside, the heat exchange plate is further provided with an interface, the interface is in communication with the flow channel, the interfaces of adjacent two heat exchange plates are in communication, and the heat management assembly further includes a manifold pipeline, the interfaces of the heat exchange plates in the two first accommodating cavities are connected through the manifold pipeline, and the manifold pipeline is provided with a heat exchange medium interface.

[0036] The flow channels of the heat exchange plates in the two first accommodating cavities are connected through the manifold pipeline, the inflow and outflow of the heat exchange medium can be realized, and compared with the mode that the heat exchange plates in the two first accommodating cavities are separately connected with the heat exchange medium through the pipeline, the structure can be simplified to reduce the space occupied by the pipeline in the box.

[0037] In some embodiments, a second accommodating cavity is formed inside the body part, the second accommodating cavity is sequentially arranged with the first accommodating cavity along a first direction, the first direction intersects with the height direction, and the manifold pipeline is located in the second accommodating cavity.

[0038] Compared with the mode that the manifold pipeline is arranged in the first accommodating cavity, the space occupied by the manifold pipeline in the first accommodating cavity can be reduced, more battery monomers can be placed in the limited space, and thus the volume energy density in the first accommodating cavity is improved.

[0039] In some embodiments, the battery further includes a limiting piece, the limiting piece is located on the side of the battery monomer away from the partition part, the limiting piece is connected with the box, the limiting piece is used to limit the movement of the battery monomer along the height direction, along the height direction, the projections of the limiting piece on the battery monomers are arranged in positions different from the relief mechanism and the electrode terminal respectively, the limiting piece extends along the first direction, the limiting piece limits a column of battery monomers arranged along the first direction, or the limiting piece limits two columns of battery monomers adjacent to each other, each column of battery monomers is arranged along the first direction, and the first direction intersects with the height direction.

[0040] The limiting piece can limit the movement of the battery monomer along the height direction of the body part, improve the reliability of the electrical connection of the electrode terminal of the battery monomer, and especially when the battery monomer is multiple, the electrode terminals of the multiple battery monomers are electrically connected in series, parallel or mixed connection mode, the setting of the limiting piece can reduce the probability of misalignment of the multiple battery monomers, so as to improve the reliability of the electrical connection. At the same time, the limiting piece can limit the movement of the battery monomer along the height direction of the body part, compared with the way that each battery monomer is limited by one limiting piece, the use of limiting piece can be reduced, the space occupied by the limiting piece in the first accommodating cavity can be reduced, and the space utilization of the first accommodating cavity can be improved.

[0041] In some embodiments, the length direction of the heat exchange plate intersects the length direction of the limiting piece.

[0042] The length direction of the heat exchange plate intersects the length direction of the limiting piece, the limiting piece can limit the movement of the heat exchange plate along the height direction of the body part, so as to reduce the probability of leakage of the heat exchange medium at the interface of the heat exchange plate, thereby improving the reliability of the work of the heat exchange plate.

[0043] In some embodiments, along the thickness direction of the heat exchange plate, the area of the part of the surface of the heat exchange plate facing the first outer wall surface in heat conduction connection is S1, the area of the first outer wall surface is S2, and the ratio of S1 to S2 is in the range of 0.8-0.9.

[0044] In this way, the heat exchange plate can cover most of the first outer wall surface, so as to improve the heat exchange efficiency between the heat exchange plate and the battery monomer, thereby improving the heat dissipation of the battery and the situation of too low temperature.

[0045] In some embodiments, the battery further comprises an insulating piece, the side of the outermost heat exchange plate in the first direction away from the battery monomer is provided with an insulating piece, and / or the battery monomer is insulated from the partition.

[0046] The insulating piece can isolate the battery monomer from the box, and / or the battery monomer is insulated from the partition, which can reduce the probability of conduction between the battery monomer and the box during the work of the battery, thereby improving the safety during the use of the battery.

[0047] In some embodiments, the partition is provided with a heat exchange medium flow channel in the inside, and the partition is further provided with a flow channel opening, which is in communication with the heat exchange medium flow channel.

[0048] The interior of the partition is provided with a heat exchange medium flow channel, which can further adjust the temperature of the battery monomers on both sides of the partition to improve the situation of excessively high or low battery monomer temperature, and when the number of battery monomers in the same first containing cavity is multiple, a heat exchange plate can be arranged between the adjacent two battery monomers to exchange heat with the battery monomers together, increase the heat exchange area of the battery monomers, and thus the temperature of the battery monomers can be adjusted more quickly to improve the situation of excessively high and low battery monomer temperature.

[0049] In some embodiments, the interior of the body part is formed with a second containing cavity, the second containing cavity is arranged in a spaced manner with the first containing cavity, the first direction intersects with the height direction, and the flow channel opening and the partial partition are arranged in the second containing cavity respectively.

[0050] The flow channel opening is arranged in the second containing cavity, compared with the structure that the flow channel opening is arranged in the first containing cavity, the space occupied by the flow channel opening in the first containing cavity can be reduced, more battery monomers can be placed in the first containing cavity, so that the space of the first containing cavity is fully utilized, thereby improving the volume energy density of the first containing cavity.

[0051] In some embodiments, in the same first containing cavity, the number of battery monomers is multiple, the multiple battery monomers are arranged along the first direction, the arrangement direction of the first containing cavity and the second containing cavity is the same as the first direction, and the first direction intersects with the height direction.

[0052] In the same first containing cavity, after the multiple battery monomers are connected in series, parallel or mixed connection, the multiple battery monomers output voltage through the output pole, the output pole is located on one side of the multiple battery monomers along the first direction, the arrangement direction of the first containing cavity and the second containing cavity is the same as the first direction, the output pole of the multiple battery monomers connected in series, parallel or mixed connection, and the flow channel opening can be arranged in the second containing cavity to facilitate the flow channel opening to access the pipeline and the parallel or series connection between the battery monomers in the two first containing cavities, and if the arrangement direction of the first containing cavity and the second containing cavity is not the same as the first direction, the output pole or the pipeline needs to be arranged in the additional space of the box. Therefore, the arrangement direction of the first containing cavity and the second containing cavity being the same as the first direction can reduce the space occupied by the box, so as to facilitate the use of the battery in a relatively small space, thereby improving the use range of the battery.

[0053] In some embodiments, the battery further comprises a heat management assembly, the heat management assembly comprises a heat exchange plate, the heat exchange plate is arranged in each first containing cavity, the heat exchange plate is in thermal conductive connection with the first outer wall surface of the shell, the thickness direction of the heat exchange plate is the first direction, the first direction intersects with the height direction, and the interior of the heat exchange plate is provided with a flow channel, and the flow channel opening is in communication with the flow channel.

[0054] Thus, the heat exchange plates and the partition part simultaneously exchange heat with the bottom surface and the side surface of the battery cells, compared with the mode in which the heat exchange plates only exchange heat with the battery cells or the partition part only exchanges heat with the battery cells, the heat exchange efficiency can be further improved, so that the temperature of the battery cells can be adjusted more quickly to improve the situation of the battery cell temperature being too high or too low.

[0055] In some embodiments, the number of heat exchange plates in the same first accommodating cavity is multiple, the thickness direction of each heat exchange plate is the first direction, the first direction intersects with the height direction of the body part, the multiple heat exchange plates are arranged in the first direction, at least one battery cell is arranged between the adjacent two heat exchange plates, the heat exchange plate is internally provided with a flow channel, the heat exchange plate is further provided with an interface, the interface is in communication with the flow channel, the interfaces of the adjacent two heat exchange plates are in communication, and the thermal management assembly further comprises a manifold pipeline, the interfaces and the flow channel openings of the heat exchange plates in the two first accommodating cavities are in communication with the manifold pipeline, and the manifold pipeline is provided with a heat exchange medium interface.

[0056] The manifold pipeline can communicate the partition part and the heat exchange plates in the two first accommodating cavities, so that the heat exchange medium can be simultaneously introduced into the partition part and the heat exchange plates, compared with the mode in which the heat exchange plates and the partition part are separately introduced into the heat exchange medium through the pipeline, the structure can be simplified to reduce the space occupied by the box.

[0057] In some embodiments, the manifold pipeline is located in the second accommodating cavity.

[0058] The manifold pipeline is arranged in the second accommodating cavity, compared with the structure in which the manifold pipeline is arranged in the first accommodating cavity, the occupied space of the first accommodating cavity can be reduced, so that the space utilization of the first accommodating cavity is improved, and the volume energy density of the first accommodating cavity is improved.

[0059] In some embodiments, the battery further comprises a first output pole and a second output pole, the battery cells in one first accommodating cavity are electrically connected with the first output pole, the battery cells in the other first accommodating cavity are electrically connected with the second output pole, and the first output pole is electrically connected with the second output pole.

[0060] The battery cells in the two first accommodating cavities can be electrically connected through the first output pole and the second output member, so that series connection or parallel connection can be realized, so that the battery can obtain a higher output voltage or output current, and the battery can be applied to high-power electrical equipment.

[0061] In some embodiments, the body part is internally formed with a second accommodating cavity, the second accommodating cavity and the first accommodating cavity are arranged in sequence along the first direction, the first direction intersects with the height direction of the body part, and at least part of the first output pole and at least part of the second output pole are respectively located in the second accommodating cavity.

[0062] The at least partial first output pole and the at least partial second output pole are respectively located in the second accommodating cavity, so that the space occupied by the first output pole and the second output pole in the first accommodating cavity can be reduced, the space in the first accommodating cavity can be fully utilized, the space utilization of the first accommodating cavity is improved, and a higher energy density can be obtained.

[0063] In some embodiments, the box assembly further comprises a cover plate, each opening cover is provided with a cover plate, and the cover plate is connected with the box.

[0064] Therefore, the packaging of the battery monomer in each first accommodating cavity can be realized, so that the protection of the battery monomer can be realized.

[0065] In a second aspect, the application provides a power utilization device comprising the battery of the first aspect, and the battery is used to provide electric energy for the power utilization device.

[0066] Since the power utilization device comprises all the technical features of the battery, the effects are the same as described above, and will not be repeated here.

[0067] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more obvious and easy to understand, the following specific embodiments of the application are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0068] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the accompanying drawings indicate the same or similar elements. In the drawings:

[0069] Fig. 1 is a structural schematic view of a power utilization device as a vehicle according to an embodiment of the application;

[0070] Fig. 2 is an exploded structural schematic view of a battery according to an embodiment of the application;

[0071] Fig. 3 is a top view of a battery according to an embodiment of the application;

[0072] Fig. 4 is a partial enlarged view at I of Fig. 3;

[0073] Fig. 5 is an exploded structural schematic view of a battery monomer according to an embodiment of the application;

[0074] Fig. 6 is a sectional view of a first section of a box according to an embodiment of the application, the first section being perpendicular to the second direction;

[0075] Fig. 7 is a sectional view of a first section of a box according to another embodiment of the application;

[0076] Fig. 8 is an axonometric view of a partition in a box according to an embodiment of the application;

[0077] Fig. 9 is a schematic view of the structure of a flow channel for a heat exchange medium in the interior of a partition in a box according to an embodiment of the application;

[0078] Fig. 10 is a partial axonometric view of a battery according to an embodiment of the application;

[0079] Fig. 11 is a partial axonometric view of a battery according to another embodiment of the application;

[0080] Fig. 12 is a partial axonometric view of a battery according to yet another embodiment of the application;

[0081] Fig. 13 is an axonometric view of a heat exchange element in a battery according to an embodiment of the application.

[0082] The reference numerals in the detailed description of the embodiments are as follows: 1000, vehicle; 100, battery; 10, box assembly; 11, box; 111, body portion; 1111, frame, 11111, opening; 1112, first receiving cavity; 1113, second receiving cavity; 112, partition; 1121, flow channel opening; 11211, first flow channel opening; 11212, second flow channel opening; 1122, heat exchange medium flow channel; 12, cover plate; 20, battery cell; 21, electrode assembly; 211, tab; 22, housing; 221, outer shell; 2211, first outer wall surface; 222, end cap assembly; 23, electrode terminal; 24, pressure relief mechanism; 30, thermal management assembly; 31, heat exchange plate; 311, heat exchange body; 312, first flow collector; 313, second flow collector; 314, interface; 3141, first interface; 3142, second interface; 32, manifold; 321, first manifold; 3211, first manifold body; 32111, heat exchange medium outlet; 3212, first manifold connector; 322, second manifold; 3221, second manifold body; 32211, heat exchange medium inlet; 3222, second manifold connector; 40, insulating member; 50, limiting member; 60, first output pole; 70, second output pole; 200, controller; 300, motor; X, first direction; Y, second direction; Z, height direction. DETAILED DESCRIPTION

[0083] The embodiments of the technical solutions of the application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the application, and therefore only serve as examples, and cannot limit the protection scope of the application.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0085] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0086] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0087] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0088] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0089] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated by the orientation or position must be constructed and operated, and therefore cannot be understood as limiting the embodiments of the present application.

[0090] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix", and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0091] At present, the space utilization rate of the battery monomer in the battery affects the volumetric energy density of the battery. Specifically, when the battery monomer adopts a structure of stacking up and down, the stacked battery monomers are loaded into the box from the same side of the box. Due to the limitation of the bottom wall of the box, the electrode terminals of the stacked battery monomers face away from each other, and there is difficulty in electrical connection between the battery monomers of the bottom layer, and the battery monomers need to be insulated towards the bottom wall of the box, which makes the structure of the battery complex and reduces the space utilization rate of the box.

[0092] In view of this, the present application provides a battery. The present application provides two first accommodating cavities in the box, each of which can accommodate a battery monomer. The two first accommodating cavities can separate the battery monomers into two layers, facilitate the electrical connection between the battery monomers in the same first accommodating cavity, and form a group of battery monomers in the same first accommodating cavity through series connection, parallel connection or mixed connection, simplify the structure inside the box, and improve the space utilization rate in the box to improve the volumetric energy density of the battery.

[0093] The embodiment of the present application provides a kind of electric device, and electric device includes battery, battery is used to provide electric energy to electric device.Electric device can be but not limited to mobile phone, tablet computer, notebook computer, electric toy, electric tool, electric car, electric car, ship, spacecraft and so on.Electric toy can include fixed or mobile electric toy, for example, game machine, electric car toy, electric ship toy and electric aircraft toy and so on, spacecraft can include aircraft, rocket, space shuttle and spaceship and so on.

[0094] The following embodiments are described for convenience, taking a vehicle 1000 as an example for illustration.

[0095] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0096] In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0097] The following embodiments are described by taking one battery 100 of some embodiments of the present application as an example for the convenience of description, with reference to FIGS. 2-10.

[0098] The battery 100 includes a battery monomer 20 and a box assembly 10. The battery monomer 20 includes a shell 22 and an electrode terminal 23 arranged on the shell 22. The box assembly 10 includes a box 11, which includes a body part 111 and a partition part 112. The interior of the body part 111 forms an accommodation space, the partition part 112 is located in the accommodation space and separates the accommodation space into two first accommodation cavities 1112 along the height direction Z of the body part 111, the two first accommodation cavities 1112 respectively pass through the surface of the body part 111 along opposite directions and respectively form an opening 11111 on the surface of the body part 111, at least one battery monomer 20 is arranged in each first accommodation cavity 1112, and the electrode terminal 23 of the battery monomer 20 is arranged towards the side wall of the first accommodation cavity 1112 or towards the opening 11111.

[0099] The connection between the body part 111 and the partition part 112 includes but is not limited to welding, bolt connection, riveting, or one-piece forming, etc.

[0100] Optionally, the partition part 112 can be one of a plate structure or a fence structure formed by a plurality of strip structures, but is not limited to.

[0101] Optionally, the battery monomer 20 arranged in the first accommodation cavity 1112 can be a square battery monomer 20 or a cylindrical battery monomer 20, but is not limited to.

[0102] Optionally, the two first accommodating cavities 1112 can be completely identical, not completely identical, or completely different.

[0103] The height direction Z of the body part 111 refers to the depth direction of the opening 11111. For convenience of description, the height direction Z in the following description refers to the height direction Z of the body part 111.

[0104] The electrode terminal 23 includes a positive electrode terminal and a negative electrode terminal. The electrode terminal 23 is located on the side of the casing 22 away from the partition part 112, that is, the positive electrode terminal and the negative electrode terminal of the battery cell 20 are both located on the side of the casing 22 away from the partition part 112.

[0105] One of the two first accommodating cavities 1112 is a first one, and the other is a second one. The two first accommodating cavities 1112 respectively pass through the surface of the body part 111 in opposite directions, that is, the first one passes through the surface of the body part 111 in the direction from the second one to the first one, and the second one passes through the surface of the body part 111 in the direction from the first one to the second one.

[0106] In the battery 100, the number of battery cells 20 can be multiple. The multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole of the multiple battery cells 20 is accommodated in the box body 11. Of course, the battery 100 can also be in the form of a battery module in which the multiple battery cells 20 are connected in series, in parallel, or in a mixed manner, and then the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, and are accommodated in the box body 11. The battery 100 can also include other structures, for example, the battery 100 can also include a current combing component for realizing the electrical connection between the multiple battery cells 20.

[0107] Each battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0108] Please refer to FIG. 5, which is an exploded structural schematic diagram of the battery cell 20 provided by some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery 100. As shown in FIG. 3, the battery cell 20 includes the casing 22, the electrode assembly 21, the pressure relief mechanism 24, and the electrode terminal 23.

[0109] The shell 22 includes an end cap assembly 222 and a housing 221. The end cap assembly 222 includes an end cap, which is a component that covers the access opening of the housing 221 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the housing 221 to fit the housing 221. Optionally, the end cap can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the end cap is less likely to deform when subjected to a pressing impact, and the battery cell 20 can have higher structural strength and improved safety performance. The end cap can be provided with functional components such as the electrode terminal 23. The electrode terminal 23 can be used to electrically connect with the electrode assembly 21 for outputting or inputting the electric energy of the battery cell 20. In some embodiments, the end cap can also be provided with a pressure relief mechanism 24 for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cap can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cap, which can be used to isolate the electrically connected components in the housing 221 from the end cap to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0110] The housing 221 is a component for fitting the end cap to form the internal environment of the battery cell 20, which can be used to accommodate the electrode assembly 21, the electrolyte, and other components. The housing 221 and the end cap can be independent components, and the access opening can be provided on the housing 221, and the end cap assembly 222 is used to cover the access opening to form the internal environment of the battery cell 20. Without limitation, the end cap and the housing 221 can also be integrated, specifically, the end cap and the housing 221 can form a common connecting surface before other components enter the shell, and the end cap is used to cover the housing 221 when it is necessary to seal the internal environment of the housing 221. The housing 221 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing 221 can be determined according to the specific shape and size of the electrode assembly 21. The material of the housing 221 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0111] The electrode assembly 21 is a component in which an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 21 can be contained within the housing 221. The electrode assembly 21 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly, and portions without active materials that each constitute a tab 211. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 211 connects the electrode terminal to form a current loop.

[0112] The box 11 is provided with two first accommodating cavities 1112, each of which can accommodate a battery cell 20. The electrode terminal 23 is located on the side of the housing 22 opposite the partition 112, so that the battery cells 20 in two layers can be accommodated in different first accommodating cavities 1112 in the box 11. The electrode terminal 23 of the battery cell 20 is arranged towards the side wall of the first accommodating cavity 1112 or towards the opening, facilitating electrical connection between the battery cells 20 in the same layer and between the battery cells 20, so that the plurality of battery cells 20 in the same first accommodating cavity 1112 form a group in series, parallel or mixed connection, simplifying the structure inside the box 11, thereby improving the space utilization in the box 11 and the volumetric energy density of the battery 20.

[0113] In some embodiments, the body part 111 includes a frame 1111, and the inner wall of the frame 1111 forms an accommodating space. The frame 1111 is connected with the partition 112.

[0114] Optionally, the partition 112 can be a plate structure, specifically a square plate.

[0115] The frame 1111 can be made of a plate or a beam, etc.

[0116] Compared with the box 11 provided with only one first accommodating cavity 1112 and having a bottom wall, the frame 1111 is provided, which eliminates the structure of the bottom wall of the box 11. Meanwhile, the partition 112 divides the accommodating space into two first accommodating cavities 1112, so that the battery cells 20 can be loaded from both sides of the box 11 to fully utilize the space of the first accommodating cavities 1112 of the box 11. When there are a plurality of battery cells 20, the electrical connection between the battery cells 20 is facilitated.

[0117] In some embodiments, referring to FIGS. 3 and 4, the battery cell 20 further comprises a pressure relief mechanism 24 disposed towards the sidewall of the first accommodating cavity 1112 or towards the opening 11111, and the pressure relief mechanism 24 is configured to release the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0118] Optionally, the pressure relief mechanism 24 can be an explosion-proof valve. One side of the shell 22 is provided with a pressure relief port, and the explosion-proof valve is installed in the pressure relief port. Alternatively, the surface of one side of the shell 22 is provided with an annular notch or groove, which forms a weak area on the shell 22, and the weak area can serve as the pressure relief mechanism 24. When the internal pressure or temperature of the battery cell 20 reaches a threshold value, the weak area is first damaged due to pressure, causing the pressure relief mechanism 24 to be opened to discharge the gas of thermal runaway.

[0119] When the battery cell 20 is in thermal runaway, the pressure relief mechanism 24 is disposed towards the sidewall of the first accommodating cavity 1112 or towards the opening 11111, so that the gas of thermal runaway can be sprayed in different directions. Compared with the mode in which the pressure relief mechanism 24 is disposed towards the partition 112, the probability of mutual influence between the battery cells 20 in the two first accommodating cavities 1112 can be reduced when the battery cell 20 is in thermal runaway, so as to improve the safety of the battery 100.

[0120] In some embodiments, the electrode terminal 23 and / or the pressure relief mechanism 24 of the battery cell 20 are disposed towards the sidewall of the first accommodating cavity 1112. The battery cell 20 is fixedly connected with the partition 112.

[0121] When the electrode terminal 23 of the battery cell 20 is disposed towards the sidewall of the first accommodating cavity 1112, the electrical connection of the electrode terminal 23 can be facilitated. When the pressure relief mechanism 24 of the battery cell 20 is disposed towards the sidewall of the first accommodating cavity 1112, the gas of thermal runaway can be sprayed in different directions. Compared with the mode in which the pressure relief mechanism 24 is disposed towards the partition 112, the probability of mutual influence between the battery cells 20 in the two first accommodating cavities 1112 can be reduced when the battery cell 20 is in thermal runaway, so as to improve the safety of the battery 100. When the electrode terminal 23 and the pressure relief mechanism 24 of the battery cell 20 are disposed towards the sidewall of the first accommodating cavity 1112, both the above-mentioned effects are taken into account. The battery cell 20 is fixedly connected with the partition 112, so as to limit the movement of the battery cell 20 along the height direction Z of the body portion. Especially when there are multiple battery cells 20, the electrode terminals 23 of the multiple battery cells 20 are electrically connected in series, in parallel or in a mixed manner, and the battery cell 20 is fixedly connected with the partition 112, so as to reduce the probability of misalignment of the multiple battery cells 20, thereby improving the reliability of the electrical connection.

[0122] In some embodiments, the electrode terminal 23 and / or the pressure relief mechanism 24 of the battery cell 20 are arranged towards the opening of the first accommodating cavity 1112. The battery cell 20 is fixedly connected with the partition 112.

[0123] When the electrode terminal 23 of the battery cell 20 is arranged towards the opening of the first accommodating cavity 1112, compared with the way that the electrode terminal 23 is arranged towards the sidewall of the first accommodating cavity 1112 (when the battery cell 20 is arranged towards the sidewall, the electrode terminal 23 needs to keep a certain distance from the sidewall), the distance between the battery cell 20 and the sidewall of the first accommodating cavity 1112 can be reduced, so that more battery cells 20 can be placed, thereby improving the space utilization of the first accommodating cavity 1112. When the pressure relief mechanism 24 is arranged towards the opening of the first accommodating cavity 1112, the gas of thermal runaway can be sprayed in different directions, compared with the way that the pressure relief mechanism 24 is arranged towards the partition 112, when the battery cell 20 is in thermal runaway, the probability that the battery cells 20 in the two first accommodating cavities 1112 affect each other can be reduced, thereby improving the safety of the battery 100. When the electrode terminal 23 and the pressure relief mechanism 24 of the battery cell 20 are arranged towards the opening of the first accommodating cavity 1112, both of the above-mentioned effects are taken into account. The battery cell 20 is fixedly connected with the partition 112, which can limit the movement of the battery cell 20 along the height direction Z of the body portion, especially when there are multiple battery cells 20, the electrode terminals 23 of the multiple battery cells 20 are electrically connected in series, parallel or mixed connection, the battery cell 20 is fixedly connected with the partition 112, which can reduce the probability of misalignment of the multiple battery cells 20, thereby improving the reliability of the electrical connection.

[0124] In some embodiments, referring to FIGS. 2 and 4, the battery 100 further comprises a limiting piece 50, which is located on the side of the battery cell 20 away from the partition 112, the limiting piece 50 is connected with the box body 11, and the limiting piece 50 is used to limit the movement of the battery cell 20 along the height direction Z of the body portion 111. Along the height direction Z, the projection of the limiting piece 50 on the battery cell 20 is arranged away from the pressure relief mechanism 24 and the electrode terminal 23, respectively.

[0125] The arrangement of the limiting piece 50 away from the pressure relief mechanism 24 and the electrode terminal 23 respectively refers to that the projection of the limiting piece 50 on the battery cell 20 is arranged away from the pressure relief mechanism 24 and the electrode terminal 23 along the height direction Z, respectively.

[0126] The arrangement of the limiting piece 50 away from the pressure relief mechanism 24 on the battery cell 20 includes that the projection of the limiting piece 50 on the battery cell 20 blocks part of the pressure relief mechanism 24, and that the projection of the limiting piece 50 on the battery cell 20 does not block the pressure relief mechanism 24 at all.

[0127] The position-limiting piece 50 is arranged in a position offset from the projection of the battery monomer 20 to the electrode terminal 23, including that the projection of the position-limiting piece 50 blocks part of the electrode terminal 23, and that the projection of the position-limiting piece 50 does not block the electrode terminal 23 at all.

[0128] Optionally, the connection between the position-limiting piece 50 and the box body 11 includes but is not limited to clamping or screw connection, etc.

[0129] Optionally, the position-limiting piece 50 can be a strip structure.

[0130] When the battery monomer 20 supplies power to the power supply component, if the battery monomer 20 moves relative to the box body 11, it is easy to cause the electrical connection between the battery monomer 20 and the power supply component to fail. The arrangement of the position-limiting piece 50 can limit the movement of the battery monomer 20 along the height direction Z of the body part, so that the battery monomer 20 can be more firmly fixed in the box body 11, thereby improving the reliability of the electrical connection of the electrode terminal 23 of the battery monomer 20.

[0131] In some embodiments, referring to FIG. 2, in the same first accommodating cavity 1112, the number of battery monomers 20 is multiple, the multiple battery monomers 20 are arranged along the first direction X, the position-limiting piece 50 extends along the first direction X, and the position-limiting piece 50 is used to limit the movement of the multiple battery monomers 20 along the height direction Z of the body part 111, and the first direction X intersects the height direction Z.

[0132] For convenience of description, in the following embodiments, the first direction X intersects the height direction Z.

[0133] Optionally, the position-limiting piece 50 can be a strip structure extending along the first direction X.

[0134] Optionally, the position-limiting piece 50 can be arranged in abutment with the battery monomer 20, or can be arranged at a certain distance from the battery monomer 20, for example, the distance between the position-limiting piece 50 and the battery monomer 20 can be any value between 0-2mm, but is not limited to this. When the position-limiting piece 50 abuts against the battery monomer 20, the connection between the position-limiting piece 50 and the box body 11 can reduce the movement of the battery monomer 20 along the height direction Z of the body part.

[0135] Therefore, one position-limiting piece 50 can realize the movement of multiple battery monomers 20 arranged along the first direction X, compared with the way that each battery monomer 20 is limited by one position-limiting piece 50, not only the number of position-limiting pieces 50 can be saved, but also the space occupied by the position-limiting piece 50 in the box body 11 where the battery monomers 20 are located can be reduced, so as to improve the space utilization.

[0136] In some embodiments, referring to FIG. 2, the plurality of battery cells 20 arranged along the first direction X is a group, the battery cells 20 are multiple groups, the multiple groups of battery cells 20 are arranged along the second direction Y, the number of the limiting members 50 is at least three, the multiple limiting members 50 are arranged along the second direction Y, the same group of battery cells 20 is limited in the movement along the height direction Z by two limiting members 50, and the second direction Y intersects with the first direction X and the height direction Z respectively.

[0137] The multiple groups refer to two or more groups and include two groups.

[0138] The two adjacent groups of battery cells 20 share one limiting member 50, that is, the same limiting member 50 limits the movement of the two adjacent groups of battery cells 20 along the height direction Z, or the two adjacent groups of battery cells 20 can not share one limiting member 50.

[0139] Compared with the mode that each battery cell 20 is limited by one limiting member 50, the battery cells 20 are multiple groups, and the same group of battery cells 20 is limited in the movement along the height direction Z by two limiting members 50, which not only simplifies the structure, but also reduces the space of the battery cell 20 in the box 11 occupied by the limiting member 50, so as to improve the space utilization.

[0140] In some embodiments, referring to FIG. 2, the two adjacent groups of battery cells 20 are limited in the movement along the height direction Z by the same limiting member 50.

[0141] Compared with the structure that the two adjacent groups of battery cells 20 are limited by four limiting members 50, the use number of the limiting members 50 can be further saved, so as to reduce the space of the battery cell 20 in the box 11 occupied by the limiting member 50, and improve the space utilization.

[0142] In some embodiments, referring to FIG. 2, the battery 100 further comprises a heat management assembly 30, the heat management assembly 30 comprises a heat exchange plate 31, each first containing cavity 1112 is provided with the heat exchange plate 31, and the heat exchange plate 31 is in thermal conductive connection with the first outer wall surface 2211 of the shell 22.

[0143] Optionally, the heat management assembly 30 further comprises a conveying pipeline, the heat exchange plate 31 has a heat exchange channel inside, the conveying pipeline is located outside the heat exchange plate 31 and communicates with both ends of the heat exchange channel, by conveying a heat exchange medium into the conveying pipeline, heat exchange between the heat exchange medium and the battery cell 20 can be realized, so as to adjust the temperature of the battery cell 20, when the temperature of the battery cell 20 is relatively low, a heat exchange medium with relatively high temperature can be conveyed to increase the temperature of the battery cell 20, and when the temperature of the battery cell 20 is relatively high, a heat exchange medium with relatively low temperature can be conveyed to cool the battery cell 20.

[0144] Since the over-high temperature and the over-low temperature can destroy the chemical reaction in the battery 100 during the charging and discharging of the battery 100, affect the service life of the battery 100, and the high temperature is easy to cause the thermal runaway of the battery 100. The heat exchange plates 31 can regulate the temperature of the battery monomer 20, improve the heat dissipation and the over-low temperature of the battery 100, and improve the service life and safety of the battery 100.

[0145] In some embodiments, referring to FIGS. 2-4, the number of the heat exchange plates 31 in the same first accommodating cavity 1112 is multiple, the multiple heat exchange plates 31 are arranged at intervals along the first direction X, and the battery monomer 20 is arranged between the adjacent two heat exchange plates 31. The thickness direction of each heat exchange plate 31 is the first direction X, and the first direction X intersects with the height direction Z of the body part 111.

[0146] Optionally, the multiple heat exchange plates 31 can be communicated with each other in series or in parallel. Specifically, each heat exchange plate 31 is provided with a first interface 3141 and a second interface 3142. The first interface 3141 and the second interface 3142 respectively penetrate the surface of the heat exchange plate 31 along the thickness direction of the heat exchange plate 31. When the multiple heat exchange plates 31 are communicated in parallel, the first interfaces 3141 of the adjacent two heat exchange plates 31 are communicated with each other, and the second interfaces 3142 of the adjacent two heat exchange plates 31 are communicated with each other. When the multiple heat exchange plates 31 are communicated in series, the first interface 3141 and the second interface 3142 of any adjacent heat exchange plate 31 are communicated, the first interface 3141 of one of the two outermost heat exchange plates 31 is communicated with the heat exchange medium, and the heat exchange medium flows through the multiple heat exchange plates 31 and flows out from the second interface 3142 of the other of the two outermost heat exchange plates 31.

[0147] Therefore, the contact area between the heat exchange plate 31 and the battery monomer 20 can be increased, the heat exchange efficiency can be improved, the heat dissipation and the over-low temperature of the battery 100 can be improved, and the service life and safety of the battery 100 can be improved.

[0148] In some embodiments, referring to FIGS. 2 and 3, a row of multiple battery monomers 20 arranged along the second direction Y is arranged between the adjacent two heat exchange plates 31, and the second direction Y intersects with the first direction X and the height direction Z of the body part 111, respectively. For convenience of description, the second direction Y, the first direction X, and the height direction Z of the body part 111 intersect with each other in each of the following embodiments. In another embodiment, the battery monomers 20 between the adjacent two heat exchange plates 31 are multiple rows, the multiple rows of battery monomers 20 are arranged along the first direction X, the number of battery monomers 20 in each row is multiple, and the battery monomers 20 in the same row are arranged along the second direction Y.

[0149] A row of battery monomers 20 refers to a group of battery monomers 20 arranged in a straight line in a number of two or more (including two).

[0150] Thus, the heat exchange plate 31 can regulate the temperature of the plurality of battery monomers 20, and the plurality of battery monomers 20 are integrated in the first accommodating cavity 1112, the plurality of battery monomers 20 in the two first accommodating cavities 1112 are stacked, the two first accommodating cavities 1112 separate the two layers of battery monomers 20, and each layer of battery monomers 20 can be electrically connected at the position of the opening 11111, so that the space in the box 11 is fully utilized, and the box 11 can have a larger capacity in a limited space.

[0151] In some embodiments, referring to FIGS. 2 and 5, the first outer wall surface 2211 is the wall with the largest surface area outside the battery monomer 20.

[0152] Thermally conductive connection refers to the heat exchange between the heat exchange plate 31 and the battery monomer 20, which can be achieved by direct contact or through a heat transfer medium.

[0153] The thermally conductive connection can be, but is not limited to, bonding or abutting.

[0154] For example, the heat exchange plate 31 can be bonded to the battery monomer 20 through a thermally conductive adhesive to achieve thermally conductive connection between the two; the heat exchange plate 31 can also be in direct contact with the battery monomer 20 to achieve thermally conductive connection between the two; or the heat exchange plate 31 can be in abutment with the battery monomer 20 through a metal plate or a non-metal plate with good thermal conductivity, and the metal plate or the non-metal plate can be bonded to the battery monomer 20 and the heat exchange plate 31 through a thermally conductive adhesive, or can not be bonded through a thermally conductive adhesive. The specific thermally conductive connection mode can be determined according to the use occasion.

[0155] The heat exchange plate 31 and the battery monomer 20 can be thermally conductively connected through a thermally conductive adhesive, or can be thermally conductively connected through abutment or a thermally conductive plate with good thermal conductivity.

[0156] Thus, compared with other wall surfaces of the heat exchange plate 31 and the battery monomer 20, the heat exchange area between the heat exchange plate 31 and the battery monomer 20 can be increased to improve the heat dissipation and the situation of excessively low temperature of the battery 100.

[0157] In some embodiments, referring to FIGS. 11 and 13, the heat exchange plate 31 is internally provided with a flow channel, and the heat exchange plate 31 is further provided with an interface 314 in communication with the flow channel, the interfaces 314 of adjacent two heat exchange plates 31 are in communication, and the heat management assembly 30 further includes a manifold 32, the interfaces 314 of the heat exchange plates 31 in the two first accommodating cavities 1112 are connected in communication through the manifold 32, and the manifold 32 is provided with a heat exchange medium interface.

[0158] Optionally, the number of interfaces 314 can be two, each interface 314 penetrating the heat exchange plate 31 along the thickness direction of the heat exchange plate 31, one of which is the first interface 3141 and the other is the second interface 3142, one of the first interface 3141 and the second interface 3142 serving as the inflow end of the medium in the flow channel, and the other serving as the outflow end of the medium in the flow channel.

[0159] Optionally, the interfaces 314 of two adjacent heat exchange plates 31 can be connected in a plug-in manner, or can be connected through a pipe joint or a connecting pipe. Specifically, the interfaces 314 of two adjacent heat exchange plates 31 can be connected in a plug-in manner in parallel or in series, or can be connected through a pipe joint or a connecting pipe.

[0160] Optionally, referring to FIG. 13, the heat exchange plate 31 comprises a first flow collector 312, a second flow collector 313 and a heat exchange body 311. The first end of the heat exchange body 311 is connected with the first flow collector 312, and the second end of the heat exchange body 311 is connected with the second flow collector 313. The direction from the first end to the second end intersects with the height direction Z and the first direction X of the body part 111, respectively. The first flow collector 312 is provided with the first interface 3141, and the second flow collector 313 is provided with the second interface 3142. In other examples, the first flow collector 312 and the second flow collector 313 can be omitted, the first end and the second end of the heat exchange body 311 are blocked by a blocking piece, and the heat exchange body 311 is provided with the first interface 3141 and the second interface 3142.

[0161] Exemplarily, the manifold pipe 32 includes a first manifold pipe 3211 and a second manifold pipe 322, the first interfaces 3141 of the outermost heat exchange plates 31 in the two first accommodating cavities 1112 are communicated through the first manifold pipe 3211, the second interfaces 3142 of the outermost heat exchange plates 31 in the two first accommodating cavities 1112 are communicated through the second manifold pipe 322, the first manifold pipe 3211 and the second manifold pipe 322 are respectively provided with heat exchange medium interfaces, the heat exchange medium interface of one of the first manifold pipe 3211 and the second manifold pipe 322 can be a heat exchange medium inlet 32211, and the heat exchange medium interface of the other can be a heat exchange medium outlet 32111. The heat exchange medium inlet 32211 and the heat exchange medium outlet 32111 serve as the total interface of the battery 100 heat exchange medium. Alternatively, the heat exchange medium outlet 32111 and the heat exchange medium inlet 3211 are located outside the box body 11, and through this connection mode, the heat exchange plates 31 in the two first accommodating cavities 1112 are connected in parallel. In another example, the first interfaces 3141 of the outermost heat exchange plates 31 in one of the first accommodating cavities 1112 are communicated through the first manifold pipe 3211, the second interfaces 3142 of the outermost heat exchange plates 31 in the other of the first accommodating cavities 1112 are communicated through the first manifold pipe 3211, the second interfaces 3142 of the outermost heat exchange plates 31 in one of the first accommodating cavities 1112 and the first interfaces 3141 of the outermost heat exchange plates 31 in the other of the first accommodating cavities 1112 are respectively communicated with one second manifold pipe 322, one second manifold pipe 322 serves as a heat exchange medium inlet pipe, and the other second manifold pipe 322 serves as a heat exchange medium outlet pipe, so as to realize the series connection of the heat exchange plates 31 in the two first accommodating cavities 1112.

[0162] Thus, the flow channels of the heat exchange plates 31 in the two first accommodating cavities 1112 can be communicated through the manifold pipe 32, compared with the mode that the heat exchange plates 31 in the two first accommodating cavities 1112 are respectively communicated with the heat exchange medium through pipes, the structure can be simplified to reduce the occupied space of the box body 11.

[0163] In some embodiments, please continue to refer to FIG. 11, the second accommodating cavity 1113 is formed in the body part 111, the second accommodating cavity 1113 is sequentially arranged along the first direction X with the first accommodating cavity 1112, and the manifold pipe 32 is located in the second accommodating cavity 1113.

[0164] Alternatively, the first manifold pipe 321 of the manifold pipe 32 includes a first pipe main body 3211, the first pipe main body 3211 includes a first branch pipe, a second branch pipe and a first manifold main pipe, the first branch pipe and the second branch pipe are respectively communicated with the first manifold main pipe, the first interface 3141 of the heat exchange plate 31 in one of the first accommodating cavities 1112 is communicated with the first branch pipe, and the first interface 3141 of the heat exchange plate 31 in the other of the first accommodating cavities 1112 is communicated with the second branch pipe.

[0165] Optionally, the second busbar pipeline 322 of the busbar pipeline 32 comprises a second pipeline body 3221, the second pipeline body 3221 comprises a third branch pipe, a fourth branch pipe and a second busbar main pipe, the third branch pipe and the fourth branch pipe are in communication with the second busbar main pipe respectively, the second interface 3142 of the heat exchange plate 31 in one of the first accommodating cavities 1112 is in communication with the third branch pipe, and the second interface 3142 of the heat exchange plate 31 in the other of the first accommodating cavities 1112 is in communication with the fourth branch pipe. One of the first busbar main pipe and the second busbar main pipe is provided with an outlet of the heat exchange medium, and the other of the first busbar main pipe and the second busbar main pipe is provided with an inlet of the heat exchange medium.

[0166] Compared with the mode that the busbar pipeline 32 is arranged in the first accommodating cavity 1112, the space occupied by the busbar pipeline 32 in the first accommodating cavity 1112 can be reduced, so that more battery monomers 20 can be placed, thereby improving the volume energy density in the first accommodating cavity 1112.

[0167] In some embodiments, referring to FIG. 2, the battery further comprises a limiting piece 50, the limiting piece 50 is located on the side of the battery monomer 20 away from the partition 112, the limiting piece 50 is connected with the box body 11, the limiting piece 50 is used for limiting the movement of the battery monomer 20 along the height direction Z, along the height direction Z, the projection of the limiting piece 50 on the battery monomer 20 is arranged in a staggered manner with the pressure relief mechanism and the electrode terminal 23 respectively, the limiting piece 50 extends along the first direction X, the limiting piece 50 limits a column of battery monomers 20 arranged along the first direction X, or the limiting piece 50 limits two adjacent columns of battery monomers 20, and each column of battery monomers 20 is arranged along the first direction X.

[0168] The connection of the limiting piece 50 with the box body 11 can be, but is not limited to, the above examples.

[0169] The limiting piece 50 can limit the movement of the battery monomer 20 along the height direction Z of the body part 111, improve the reliability of the electrical connection of the electrode terminal 23 of the battery monomer 20, and especially when the battery monomer 20 is multiple, the electrode terminals 23 of the multiple battery monomers 20 are electrically connected in series, parallel or mixed connection, the arrangement of the limiting piece 50 can reduce the probability of misalignment of the multiple battery monomers 20, thereby improving the reliability of the electrical connection. At the same time, the limiting piece 50 can limit the movement of a column of battery monomers 20 along the height direction Z of the body part 111, compared with the mode that each battery monomer 20 is limited by one limiting piece 50, the use of the limiting piece 50 can be reduced, so that the space occupied by the limiting piece 50 in the first accommodating cavity 1112 is reduced, thereby improving the space utilization of the first accommodating cavity 1112.

[0170] In some embodiments, referring to FIG. 2, the length direction of the heat exchange plate 31 intersects the length direction of the limiting piece 50.

[0171] The length direction of the heat exchange plate 31 refers to the interval direction of the first current collector 312 and the second current collector 313, and can also be the interval direction of the inflow port and the outflow port of the flow channel of the heat exchange plate 31.

[0172] The length direction of the heat exchange plate 31 intersects with the length direction of the limiting piece 50, and the limiting piece 50 can limit the movement of the heat exchange plate 31 along the height direction Z of the body part 111, so as to reduce the probability of leakage of the heat exchange medium at the interface of the heat exchange plate 31, thereby improving the reliability of the heat exchange plate 31 in operation.

[0173] In some embodiments, along the thickness direction of the heat exchange plate 31, the area of the part of the surface of the heat exchange plate 31 that is in thermal conductive connection with the first outer wall surface 2211 is S1, the area of the first outer wall surface 2211 is S2, and the ratio of S1 to S2 ranges from 0.8 to 0.9.

[0174] Optionally, the heat exchange plate 31 can be in thermal conductive connection with one battery monomer 20, or can be in thermal conductive connection with multiple battery monomers 20. For example, the heat exchange plate 31 is in thermal conductive connection with multiple battery monomers 20, the multiple battery monomers 20 are arranged along the second direction Y, and the first outer wall surface 2211 is the wall body with the largest surface area of the battery monomer, so as to realize heat exchange between the heat exchange plate 31 and the large surface of the battery monomer 20.

[0175] In this way, the heat exchange plate 31 can cover most of the first outer wall surface 2211, so as to improve the heat exchange efficiency between the heat exchange plate 31 and the battery monomer 20, thereby improving the heat dissipation performance and the situation of excessively low temperature of the battery 100.

[0176] In some embodiments, referring to FIG. 2, the battery monomer 20 assembly further includes an insulating piece 40, the two heat exchange plates 31 at the outermost sides along the first direction X are respectively provided with the insulating piece 40 away from each other, and / or the battery monomer 20 is insulated from the partition part 112.

[0177] Optionally, the insulating piece 40 can be a plastic plate or a rubber plate with electrical insulation performance. For example, the insulating piece 40 includes but is not limited to one of a polyethylene plate, an insulating adhesive layer, and an epoxy resin plate.

[0178] Optionally, the insulation mode of the battery monomer 20 from the partition part 112 includes but is not limited to one or a combination of more than one of insulating adhesive bonding, insulating gasket, and insulating plate insulation.

[0179] The insulating piece 40 can isolate the battery monomer 20 from the box body 11, and / or the battery monomer 20 is insulated from the partition part 112, which can reduce the probability of conduction between the battery monomer 20 and the box body 11 during the operation of the battery 100, thereby improving the safety of the battery 100 during use.

[0180] In some embodiments, referring to FIGS. 7-9, the inner part of the partition 112 is provided with a heat exchange medium flow channel 1122, and the outer surface of the partition 112 is provided with a flow channel opening 1121 which is in communication with the heat exchange medium flow channel 1122.

[0181] Optionally, the heat exchange medium flow channel 1122 can be a bent flow channel or a straight flow channel, which can be set according to actual needs.

[0182] The flow channel opening 1121 includes a first flow channel opening 112111 and a second flow channel opening 11212, which are respectively in communication with the heat exchange medium flow channel 1122. One of the first flow channel opening 112111 and the second flow channel opening 11212 serves as an inlet, and the other serves as an outlet.

[0183] The heat exchange medium flow channel 1122 in the partition 112 can be in communication with the heat exchange flow channel in the heat exchange plate 31, or can not be in communication.

[0184] The inner part of the partition 112 is provided with a heat exchange medium flow channel 1122, which can further adjust the temperature of the battery monomers 20 on both sides of the partition 112 to improve the situation that the temperature of the battery monomers 20 is too high or too low. When the number of battery monomers 20 in the same first accommodating cavity 1112 is multiple, a heat exchange plate 31 can be arranged between adjacent two battery monomers 20 to exchange heat with the battery monomers 20 together, increase the heat exchange area of the battery monomers 20, and thus the temperature of the battery monomers 20 can be adjusted more quickly to improve the situation that the temperature of the battery monomers 20 is too high or too low.

[0185] In some embodiments, referring to FIGS. 7-9, the flow channel opening 1121 and part of the partition 112 are located in the second accommodating cavity 1113.

[0186] The flow channel opening 1121 is located in the second accommodating cavity 1113, which can reduce the space occupied by the flow channel opening 1121 in the first accommodating cavity 1112, so that more battery monomers 20 can be placed in the first accommodating cavity 1112, so that the space of the first accommodating cavity 1112 is fully utilized, thereby improving the volume energy density of the first accommodating cavity 1112.

[0187] In some embodiments, referring to FIGS. 7-9, in the same first accommodating cavity 1112, the number of battery monomers 20 is multiple, and the multiple battery monomers 20 are arranged along the first direction X. The arrangement direction of the first accommodating cavity 1112 and the second accommodating cavity is the same as the first direction X.

[0188] In the same first accommodating cavity 1112, after the plurality of battery monomers 20 are connected in series, parallel or mixed connection, the plurality of battery monomers 20 output voltage through the output pole, the output pole is located on one side of the plurality of battery monomers 20 along the first direction X, the arrangement direction of the first accommodating cavity 1112 and the second accommodating cavity is the same as the first direction X, the output pole, the flow channel port 1121 of the plurality of battery monomers 20 connected in series, parallel or mixed connection can be arranged in the second accommodating cavity, so as to facilitate the flow channel port 1121 to access the pipeline, and the parallel or series connection between the battery monomers 20 in the two first accommodating cavities 1112, and the arrangement direction of the first accommodating cavity 1112 and the second accommodating cavity is not the same as the first direction X, then the output pole or the pipeline needs to be additionally arranged in the space of the box body 11. Therefore, the arrangement direction of the first accommodating cavity 1112 and the second accommodating cavity is the same as the first direction X, which can reduce the space occupied by the box body 11, so as to facilitate the battery 100 to be used in a relatively small space, thereby improving the use range of the battery 100.

[0189] In some embodiments, please refer to FIG. 8 and FIG. 12, the flow channel port 1121 is in communication with the internal flow channel of the heat exchange plate 31.

[0190] Optionally, the first flow channel port 11211 and the second flow channel port 11212 respectively penetrate at least one end of the partition portion 112 along the height direction Z.

[0191] Optionally, when the number of the heat exchange plates 31 in the two first accommodating cavities 1112 is one, the first flow channel port 11211 and the second flow channel port 11212 are respectively the medium inlet and the medium outlet, the first flow channel port 11211 can be in communication with the first interface 3141 of the heat exchange plate 31 in the two first accommodating cavities 1112, and the second flow channel port 11212 can be in communication with the second interface 3142 of the heat exchange plate 31 in the two first accommodating cavities 1112. When the number of the heat exchange plates 31 is multiple, the first flow channel port 11211 can be in communication with the first interface 3141 of the outermost heat exchange plate 31 in the two first accommodating cavities 1112, and the second flow channel port 11212 can be in communication with the second interface 3142 of the outermost heat exchange plate 31 in the two first accommodating cavities 1112. The flow channel port 1121 and the flow channel can be in communication through the pipeline and / or the joint.

[0192] Therefore, the heat exchange plate 31 and the partition portion simultaneously exchange heat with the bottom surface and the side surface of the battery monomer 20, compared with the mode that the heat exchange plate 31 exchanges heat with the battery monomer 20 or the partition portion exchanges heat with the battery monomer 20, the heat exchange efficiency can be further improved, so that the temperature of the battery monomer 20 can be adjusted more quickly, thereby improving the situation that the temperature of the battery monomer 20 is too high or too low.

[0193] In some embodiments, referring to FIGS. 8, 12 and 13, the number of heat exchange plates 31 in the same first accommodating cavity 1112 is multiple, the thickness direction of each heat exchange plate 31 is the first direction X, the multiple heat exchange plates 31 are arranged at intervals along the first direction X, at least one battery cell 20 is arranged between the adjacent two heat exchange plates 31, the heat exchange plate 31 is internally provided with a flow channel, the heat exchange plate 31 is further provided with an interface 314, the interface 314 is in communication with the flow channel, the interfaces 314 of the adjacent two heat exchange plates 31 are in communication, the thermal management assembly 30 further comprises a manifold pipe 32, the interfaces 314 and the flow channel openings 1121 of the heat exchange plates 31 in the two first accommodating cavities 1112 are in communication with the manifold pipe 32, and the manifold pipe 32 is provided with a heat exchange medium interface.

[0194] Optionally, the first manifold pipe 321 further comprises a first pipe connecting piece 3212, and the first pipe body 3211 is in communication with the first flow channel opening 11211 through the first pipe connecting piece 3212. The first pipe connecting piece 3212 includes but is not limited to a connecting pipe or a pipe switching accessory (such as a tee, an elbow or a valve).

[0195] Optionally, the second manifold pipe 322 further comprises a second pipe connecting piece 3222, and the second pipe body 3221 is in communication with the second flow channel opening through the second pipe connecting piece 3222. The second pipe connecting piece 3222 includes but is not limited to a connecting pipe or a pipe switching accessory (such as a tee, an elbow or a valve).

[0196] The manifold pipe 32 can communicate the heat exchange plates 31 in the two first accommodating cavities 1112 and the partition 112, so that the heat exchange medium can be introduced into the heat exchange plates 31 and the partition 112 at the same time. Compared with the way of introducing the heat exchange medium into the heat exchange plates 31 and the partition 112 through the pipe separately, the structure can be simplified to reduce the space occupied by the box 11.

[0197] In some embodiments, the manifold pipe 32 in communication with the flow channel openings 1121 and the interfaces 314 of the heat exchange plates 31 in the two first accommodating cavities 1112 is located in the second accommodating cavity 1113.

[0198] The adjacent two heat exchange plates 31 can be connected in series or in parallel as described above, which will not be described here.

[0199] The manifold pipe 32 is arranged in the second accommodating cavity 1113, compared with the structure that the manifold pipe 32 is arranged in the first accommodating cavity 1112, the occupied space of the first accommodating cavity 1112 can be reduced, so that the space utilization rate of the first accommodating cavity 1112 is improved, and the volume energy density of the first accommodating cavity 1112 is improved.

[0200] In some embodiments, referring to FIG. 10, the battery 100 further comprises a first output pole 60 and a second output pole 70, the battery monomer 20 in one first accommodating cavity 1112 is electrically connected with the first output pole 60, the battery monomer 20 in another first accommodating cavity 1112 is electrically connected with the second output pole 70, and the first output pole 60 is electrically connected with the second output pole 70.

[0201] Exemplarily, the number of the battery monomers 20 in each first accommodating cavity 1112 is multiple, the multiple battery monomers 20 can be connected in series, in parallel or in mixed connection through the busbar and form a battery pack, the number of the first output poles 60 of one first accommodating cavity 1112 can be two, the two first output poles 60 are respectively electrically connected with different busbars to serve as the positive and negative connection terminals of the battery pack, the number of the second output poles 70 of another first accommodating cavity 1112 is two, the two second output poles 70 are electrically connected with the battery pack in the another first accommodating cavity 1112 to serve as the positive and negative connection terminals of the battery pack in the another first accommodating cavity 1112, the positive connection terminals of the two battery packs are electrically connected with each other, and the negative connection terminals of the two battery packs are electrically connected with each other to realize the parallel connection of the two battery packs, or the positive connection terminal of one battery pack is electrically connected with the negative connection terminal of another battery pack to realize the series connection of the two battery packs, and the other first output pole 60 and the second output pole 70 serve as the output terminals of the battery 100.

[0202] Optionally, the first output pole 60 and the second output pole 70 can be electrically connected through a copper plate or a wire.

[0203] The battery monomers 20 in the two first accommodating cavities 1112 can be electrically connected through the first output pole 60 and the second output pole 70 to realize the series connection or the parallel connection, so that the battery can obtain higher output voltage or output current, and the battery 100 can be applied to high-power electrical equipment.

[0204] In some embodiments, referring to FIG. 10, at least part of the first output pole 60 and at least part of the second output pole 70 are respectively located in the second accommodating cavity 1113.

[0205] Optionally, the first output pole 60 can be electrically connected with the above-mentioned busbar in one first accommodating cavity 1113, the second output pole 70 can be electrically connected with the above-mentioned busbar in another first accommodating cavity 1113, part of the first output pole 60 and part of the second output pole 70 can be arranged in the second accommodating cavity 1113, and part of the first output pole 60 and part of the second output pole 70 can be located in different first accommodating cavities 1113.

[0206] The at least partial first output pole 60 and the at least partial second output pole 70 are respectively located in the second accommodating cavity 1113, so that the space occupied by the first output pole 60 and the second output pole 70 in the first accommodating cavity 1112 can be reduced, the space in the first accommodating cavity 1112 can be fully utilized, the space utilization of the first accommodating cavity 1112 can be improved, and a higher volumetric energy density can be obtained.

[0207] In some embodiments, referring to FIG. 2, the box assembly 10 further comprises a cover plate 12, each opening 11111 is covered by the cover plate 12, and the cover plate 12 is connected to the box 11.

[0208] Optionally, the cover plate 12 can be a plate structure or a hollow structure with an accommodating opening at one end. For example, the cover plate 12 is a hollow structure with an accommodating opening at one end, the accommodating opening of the cover plate 12 and the opening 11111 are arranged towards each other, the cover plate 12 covers the opening 11111 of the box 11, and the hollow structure of the cover plate 12 and the first accommodating cavity 1112 jointly form a space for accommodating the battery monomer 20.

[0209] The cover plate 12 and the box 11 can be connected by bolt connection or stud connection.

[0210] The box assembly 10 composed of the cover plate 12 and the box 11 can have various shapes, such as a cuboid, a T shape or an inverted H shape.

[0211] In this way, the packaging of the battery monomer 20 in each first accommodating cavity 1112 can be realized, so that the protection of the battery monomer 20 can be realized.

[0212] In an optional embodiment of the battery 100, referring to Figures 2-5, the battery 100 includes a thermal management assembly 30, a battery cell 20, a housing assembly 10, and a limiting member 50. The battery cell 20 includes a housing 22 and electrode terminals 23, with the electrode terminals 23 disposed on the housing 22. The housing assembly 10 includes a housing 11 and a cover plate 12. The housing 11 includes a body portion 111 and a partition portion 112. An accommodating space is formed inside the body portion 111. The partition portion 112 is located within the accommodating space and divides the accommodating space into two first accommodating cavities 1112 along the height direction Z of the body portion 111. The two first accommodating cavities 1112 penetrate the surface of the body portion 111 in a direction opposite to each other, and each forms an opening 11111 on the surface of the body portion 111. Each opening 11111 is covered by a cover plate 12, which is connected to the housing 11. Each first receiving cavity 1112 is equipped with a thermal management assembly 30 and multiple battery cells 20, and the electrode terminals 23 of each battery cell 20 are located on the side of the housing 22 opposite to the partition 112. The thermal management assembly 30 includes multiple heat exchange plates 31, which are spaced apart along a first direction X. Multiple battery cells 20 are disposed between two adjacent heat exchange plates 31, and the multiple battery cells 20 are arranged along a second direction Y. The first outer wall surfaces 2211 of the multiple battery cells 20 are respectively bonded to the heat exchange plates 31. The first outer wall surface 2211 is the wall with the largest surface area of ​​the battery cell 20. Along the thickness direction of the heat exchange plate 31, the area of ​​the portion of the surface of the heat exchange plate 31 facing the battery cell 20 that is thermally connected to the first outer wall surface 2211 is S1, and the area of ​​the first outer wall surface 2211 is S2. The ratio of S1 to S2 is in the range of 0.8-0.9. The battery cell 20 includes a housing 22, a pressure relief mechanism 24, and electrode terminals 23. Electrode terminals 23 and pressure relief mechanism 24 are respectively disposed on the side of housing 22 away from partition 112. Pressure relief mechanism 24 is configured to release internal pressure of battery cell 20 when internal pressure or temperature of battery cell 20 reaches a threshold. Battery 100 also includes limiting member 50, which is located on the side of battery cell 20 away from partition 112 and connected to housing 11. Limiting member 50 is used to restrict movement of battery cell 20 along the height direction Z of body portion 111. Along the height direction Z, the projection of limiting member 50 on battery cell 20 is offset from pressure relief mechanism and electrode terminals 23 respectively. Limiting member 50 extends along first direction X and restricts two adjacent rows of battery cells 20. Each row of battery cells 20 is arranged along the first direction X, which intersects with height direction Z.

[0213] Two first accommodating cavities 1112 are arranged in the box body 11, each of which can accommodate the battery monomer 20, and the electrode terminal 23 is located on the side of the shell 22 opposite to the partition 112, so that the battery monomers 20 of two layers can be accommodated in different first accommodating cavities 1112 in the box body 11, facilitating the electrical connection between the battery monomers 20 of the same layer and the battery monomers 20, so that the plurality of battery monomers 20 in the same first accommodating cavity 1112 form a group in a series connection, parallel connection or mixed connection manner, so that the plurality of battery monomers 20 of each layer are more closely attached together, so that the space in the first accommodating cavity 1112 is more fully utilized, thereby improving the volumetric energy density of the battery 100; at the same time, when the battery monomer 20 is in thermal runaway, the pressure relief mechanism 24 is opened, so that the battery monomers 20 of the two first accommodating cavities 1112 are not affected by each other, so as to improve the safety of the battery 100; and, by arranging the electrode terminal 23 on the side of the shell 22 opposite to the partition 112, it is also convenient to arrange the heat exchange plate 31 between the adjacent two battery monomers 20, so as to realize the large-area water cooling of the plurality of battery monomers 20, which not only can improve the safety of the battery 100, but also can improve the service life of the battery 100.

[0214] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, wherein, The battery comprises: a battery cell comprising a shell and an electrode terminal provided on the shell; a box assembly comprising a box, the box comprising a body portion and a partition portion, an accommodating space being formed in the body portion, the partition portion being located in the accommodating space and separating the accommodating space into two first accommodating cavities along a height direction of the body portion, the two first accommodating cavities being respectively open on the surface of the body portion in opposite directions, at least one battery cell being arranged in each first accommodating cavity, and the electrode terminal of the battery cell being arranged towards the side wall of the first accommodating cavity or towards the opening.

2. The battery of claim 1 or 2, wherein, The body portion comprises: a frame arranged around the edge of the partition portion, the inner wall of the frame forming the side wall of the accommodating space, and the frame being connected with the partition portion.

3. The battery according to claim 1 or 2, wherein The battery cell further comprises a pressure relief mechanism arranged towards the side wall of the first accommodating cavity or towards the opening, the pressure relief mechanism being configured to release the internal pressure of the battery cell when the internal pressure or temperature of the battery cell reaches a threshold value.

4. The battery of claim 3, wherein, The electrode terminal of the battery cell and / or the pressure relief mechanism are arranged towards the side wall of the first accommodating cavity; and the battery cell is fixedly connected with the partition portion.

5. The battery of claim 3 or 4, wherein, The electrode terminal of the battery cell and / or the pressure relief mechanism are arranged towards the opening of the first accommodating cavity; and the battery cell is fixedly connected with the partition portion.

6. The battery of claim 5, wherein, The battery further comprises a limiting piece located on the side of the battery cell away from the partition portion, the limiting piece being connected with the box, the limiting piece being used to limit the movement of the battery cell along the height direction, and the limiting piece being arranged in a position different from the pressure relief mechanism and the electrode terminal in the projection of the battery cell along the height direction.

7. The battery of claim 6, wherein, In the same first accommodating cavity, the number of battery cells is multiple, the multiple battery cells are arranged along a first direction, and the limiting piece extends along the first direction, the limiting piece being used to limit the movement of the multiple battery cells along the height direction of the body portion, the first direction intersecting the height direction.

8. The battery of claim 7, wherein, The multiple battery cells arranged along the first direction form a group, the battery cells form multiple groups, the multiple groups of battery cells are arranged along a second direction, the number of limiting pieces is at least three, the multiple limiting pieces are arranged along the second direction, the same group of battery cells is limited by two limiting pieces along the height direction, and the second direction intersects the first direction and the height direction, respectively.

9. The battery of claim 8, wherein, Adjacent two groups of battery cells are limited by the same limiting piece along the height direction.

10. The battery of any one of claims 3-9, wherein, The battery further comprises a heat management assembly, the heat management assembly comprising a heat exchange plate, the heat exchange plate being arranged in each first accommodating cavity and being in thermal conductive connection with the first outer wall surface of the shell.

11. The battery of claim 10, wherein, The number of the heat exchange plates in the first accommodating cavity is multiple, the thickness direction of each heat exchange plate is the first direction, the first direction intersects with the height direction of the body part, multiple heat exchange plates are arranged along the first direction, and at least one battery monomer is arranged between two adjacent heat exchange plates.

12. The battery of claim 11, wherein, A plurality of battery monomers arranged along the second direction are arranged between two adjacent heat exchange plates, Or, the battery monomers between two adjacent heat exchange plates are multiple rows, the battery monomers in each row are arranged along the first direction, the number of the battery monomers in each row is multiple, and the battery monomers in the same row are arranged along the second direction, The second direction intersects with the first direction and the height direction of the body part respectively.

13. The battery of any one of claims 10-12, wherein, The first outer wall surface is the wall surface with the largest surface area outside the battery monomer.

14. The battery of any one of claims 11-13, wherein, The heat exchange plate is internally provided with a flow channel, and the heat exchange plate is further provided with an interface, the interface communicates with the flow channel, the interfaces of two adjacent heat exchange plates communicate with each other, the heat management assembly further comprises a manifold pipe, the interfaces of the heat exchange plates in the two first accommodating cavities communicate with each other through the manifold pipe, and the manifold pipe is provided with a heat exchange medium interface.

15. The battery of claim 14, wherein, The body part is internally formed with a second accommodating cavity, the second accommodating cavity is sequentially arranged along the first direction with the first accommodating cavity, the first direction intersects with the height direction, and the manifold pipe is located in the second accommodating cavity.

16. The battery of any one of claims 10-15, wherein, The battery further comprises a limiting piece, the limiting piece is located on the side of the battery monomer away from the partition, the limiting piece is connected with the box body, the limiting piece is used for limiting the movement of the battery monomer along the height direction, along the height direction, the projections of the limiting piece on the battery monomer are arranged in a staggered manner with the pressure relief mechanism and the electrode terminal respectively, the limiting piece extends along the first direction, the limiting piece limits a column of battery monomers arranged along the first direction, or the limiting piece limits two adjacent columns of battery monomers, each column of battery monomers is arranged along the first direction, and the first direction intersects with the height direction.

17. The battery of claim 16, wherein, The length direction of the heat exchange plate intersects with the length direction of the limiting piece.

18. The battery of any one of claims 13-17, wherein, Along the thickness direction of the heat exchange plate, the area of the part of the surface of the heat exchange plate facing the battery monomer and in heat conduction connection with the first outer wall surface is S1, the area of the first outer wall surface is S2, and the ratio of S1 to S2 ranges from 0.8 to 0.

9.

19. The battery of any one of claims 11-18, wherein, The battery further comprises an insulating piece, the side of the heat exchange plate farthest away from the battery monomer along the first direction is provided with the insulating piece, and / or the battery monomer and the partition are arranged in an insulating manner.

20. The battery of any one of claims 1-19, wherein, The partition is internally provided with a heat exchange medium flow channel, and the partition is further provided with a flow channel port, the flow channel port communicates with the heat exchange medium flow channel.

21. The battery of claim 20, wherein, The body part is internally formed with a second accommodating cavity, the second accommodating cavity is sequentially arranged along the first direction with the first accommodating cavity, the first direction intersects with the height direction, and the flow channel port and part of the partition are located in the second accommodating cavity.

22. The battery of claim 21, wherein, The number of the battery monomers in the same first accommodating cavity is multiple, and the multiple battery monomers are arranged along a first direction.

23. The battery of any one of claims 20-22, wherein, The battery further comprises a heat management assembly, the heat management assembly comprises a heat exchange plate, each first accommodating cavity is provided with the heat exchange plate, the heat exchange plate is in thermal conductive connection with the first outer wall surface of the shell, the thickness direction of the heat exchange plate is the first direction, the first direction intersects with the height direction, the inside of the heat exchange plate is provided with a flow channel, and the flow channel port is in communication with the flow channel.

24. The battery of claim 23, wherein, The number of the heat exchange plates in the same first accommodating cavity is multiple, the thickness direction of each heat exchange plate is the first direction, the first direction intersects with the height direction of the body part, the multiple heat exchange plates are arranged at intervals along the first direction, at least one battery monomer is arranged between two adjacent heat exchange plates, the inside of the heat exchange plate is provided with a flow channel, the heat exchange plate is further provided with an interface, the interface is in communication with the flow channel, the interfaces of two adjacent heat exchange plates are in communication, the heat management assembly further comprises a manifold, the interfaces of the heat exchange plates in the two first accommodating cavities and the flow channel ports are in communication with the manifold, and the manifold is provided with a heat exchange medium interface.

25. The battery of claim 24, wherein, The manifold is located in the second accommodating cavity.

26. The battery of any one of claims 1-25, wherein, The battery further comprises a first output pole and a second output pole, the battery monomers in one first accommodating cavity are electrically connected with the first output pole, the battery monomers in another first accommodating cavity are electrically connected with the second output pole, and the first output pole is electrically connected with the second output pole.

27. The battery of claim 26, wherein, The inside of the body part is formed with a second accommodating cavity, the second accommodating cavity and the first accommodating cavity are sequentially arranged along a first direction, the first direction intersects with the height direction, and at least part of the first output pole and at least part of the second output pole are respectively located in the second accommodating cavity.

28. The battery of any one of claims 1-27, wherein, The box assembly further comprises a cover plate, each opening is provided with the cover plate, and the cover plate is connected with the box.

29. An electrical device, comprising: The battery comprises the battery as claimed in any one of claims 1-28, and the battery is used for providing electric energy for the electric device.

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