Battery modules and battery packs

Abstract

DEPCT67 This new invention introduces a type of battery module and battery pack. The battery module... It consists of a module set and straps that wrap around the module set. The module set contains: a battery cell set. It consists of at least one battery cell combination. A battery cell combination consists of cells. Multiple batteries arranged in a specific direction, with the electrical unit mounted on top of the battery cell pack. Electrically connected to the battery cell assembly, the two end plates are arranged spaced apart in the direction specified. One is installed on opposite sides of the battery cell pack, respectively. It has a heat shield for the plate. The end cap is installed between each end plate and the battery cell assembly. The top cover is installed on top of... The battery cell assembly and the electrical assembly are securely connected to the electrical assembly. They have heat-resistant components. The top part is mounted between the top cover and the electrical assembly. It includes two side heat shields. Arranged in a spaced manner in the second direction and installed on opposite sides of the battery cell pack in sequence. Where the first and second directions are perpendicular to each other and both are perpendicular to the vertical direction, in order to solve the problem. The risk of heat loss from the battery module in existing technology.

Description

Battery modules and battery packs Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module and a battery pack. Background Art

[0002] At present, electric vehicles are a hot development direction in the current automotive industry. Among them, the battery module is a very important module in electric vehicles. In the process of extending the vehicle's endurance and pursuing energy density, the safety of the battery pack has also received more and more attention. Therefore, reducing the risk of thermal runaway of the battery pack to improve the safety of the battery pack is an urgent goal to be achieved.

[0003] The battery module in the existing technology is usually welded with end plates and side plates to form a fixed frame, and the battery cells are placed in the frame. The length, width and height of the frame are 355mm, 390mm and 590mm respectively. The installation space required is relatively large, and the number of battery modules that can be placed in the same battery pack is limited, resulting in a low energy density of the entire battery pack. Summary of the Invention

[0004] The main purpose of the present invention is to provide a battery module and a battery pack to solve the problem of high thermal runaway risk of battery modules in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery module is provided, including a module assembly and a cable tie sleeved on the outside of the module assembly; the module assembly includes: a battery cell assembly, including at least one battery cell combination, the battery cell combination including a plurality of battery cells arranged in sequence along a first direction; an electrical assembly, arranged above the battery cell assembly and electrically connected to the battery cell assembly; two end plates, spaced apart along the first direction and respectively located on opposite sides of the battery cell assembly, and end plate insulation members are arranged between each end plate and the battery cell assembly; an upper cover, arranged above the battery cell assembly and the electrical assembly and fixedly connected to the electrical assembly, and a top insulation member is arranged between the upper cover and the electrical assembly; two side insulation members, spaced apart along the second direction and respectively located on opposite sides of the battery cell assembly; wherein the first direction and the second direction are perpendicular to each other and both perpendicular to the vertical direction.

[0006] Furthermore, the end plate thermal insulation component includes a main board body located between the battery cell assembly and the corresponding end plate, and insulating protective layers are provided on both sides of the main board body spaced apart along the second direction, and a buffer layer is provided on the side of the main board body close to the corresponding end plate.

[0007] Furthermore, the insulating protective layer includes a first plate portion and a second plate portion that are perpendicular and connected to each other, the first plate portion is located between the main plate and the corresponding end plate, and the second plate portion is located between the battery cell assembly and the corresponding side thermal insulation member.

[0008] Furthermore, the main board body includes at least one of an epoxy board, a mica board and a plastic raw material board; and / or the insulating protective layer includes at least one of ceramic silicone rubber, mica tape, ceramic glass fiber cloth and basalt ceramic cloth; and / or the buffer layer includes at least one of a foam layer and an aerogel layer.

[0009] Furthermore, the upper cover is made of mica board; and / or the thickness of the upper cover is 1mm to 2mm; and / or the top thermal insulation includes at least one of ceramic silicone rubber, mica tape, ceramic glass fiber cloth, and basalt ceramic cloth; and / or the side thermal insulation is made of mica board; and / or the thickness of the side thermal insulation is 0.5mm to 1.5mm; and / or the opposite ends of the side thermal insulation are fixedly connected to the two end plates respectively; and / or there are multiple cable ties, and the multiple cable ties are arranged at intervals in the vertical direction, and each cable tie is arranged around the center line of the module assembly extending in the vertical direction and is sleeved outside the module assembly; and / or an aerogel layer is provided between two adjacent battery cells in the same battery cell combination.

[0010] Furthermore, the electrical assembly includes: a busbar, which is arranged above the battery cell assembly and electrically connected to each battery cell in the battery cell assembly; a wiring harness isolation plate, which is arranged on the side of the busbar close to the battery cell assembly and fixedly connected to the upper cover through the upper cover fasteners; wherein the top thermal insulation member is located between the busbar and the upper cover.

[0011] Furthermore, the wiring harness isolation plate includes a plate body and a connecting protrusion connected to the plate body and extending in a direction away from the battery cell assembly. The plate body is located between the battery cell assembly and the bus. A first avoidance hole is provided on the bus for avoiding the connecting protrusion. The connecting protrusion reaches the top of the bus after passing through the first avoidance hole; the upper cover is provided with a first through hole for one end of the upper cover fastener to pass through, and a first fastening hole is provided on the connecting protrusion for inserting the upper cover fastener. One end of the upper cover fastener passes through the corresponding first through hole and is inserted into the corresponding first fastening hole to fix the upper cover and the wiring harness isolation plate.

[0012] Furthermore, the battery cell assembly includes a plurality of battery cell assemblies, and the plurality of battery cell assemblies are arranged in sequence along the second direction, and an intermediate heat insulating member is provided between any two adjacent battery cell assemblies.

[0013] Furthermore, the upper cover includes multiple cover bodies, which are arranged one by one above the multiple battery cell combinations, and the upper side surface of the middle thermal insulation is higher than the upper surface of the cover body; and / or the middle thermal insulation is made of epoxy board; and / or the thickness of the middle thermal insulation is 1.5mm to 2.5mm.

[0014] According to another aspect of the present invention, a battery pack is provided, comprising the above-mentioned battery module.

[0015] Applying the technical solution of the present invention, the battery module of the present invention includes a module assembly and a cable tie sleeved outside the module assembly; the module assembly includes: a battery cell assembly, including at least one battery cell combination, the battery cell combination including a plurality of battery cells arranged in sequence along a first direction; an electrical assembly, arranged above the battery cell assembly and electrically connected to the battery cell assembly; two end plates, spaced apart along the first direction and respectively located on opposite sides of the battery cell assembly, and end plate thermal insulation members are provided between each end plate and the battery cell assembly; an upper cover, arranged above the battery cell assembly and the electrical assembly and fixedly connected to the electrical assembly, and a top thermal insulation member is provided between the upper cover and the electrical assembly; two side thermal insulation members, spaced apart along the second direction and respectively located on opposite sides of the battery cell assembly; wherein the first direction and the second direction are perpendicular to each other and both perpendicular to the vertical direction. Compared with the battery modules in the prior art, the battery module of the present invention reduces the number and volume of components in the battery module while reducing costs by setting end plate insulation, top insulation and side insulation, greatly reducing the total weight of the battery module and the required installation space, improving the grouping efficiency and energy density of the battery module, delaying or preventing the time for thermal runaway of the battery module, improving the safety performance of the battery module, and completely separating adjacent battery modules so that the thermal runaway range can be controlled within a certain space when thermal runaway occurs in the battery cell, thereby achieving the purpose of preventing the battery module from thermal runaway or delaying the occurrence of thermal runaway, increasing the safety performance of the entire battery pack, and solving the problem of high thermal runaway risk of battery modules in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] FIG1 shows a schematic structural diagram of an embodiment of a battery module according to the present invention;

[0018] FIG2 shows an exploded view of the battery module shown in FIG1 ;

[0019] FIG3 shows a schematic structural diagram of a module assembly of the battery module shown in FIG1 ;

[0020] FIG4 shows a partial enlarged view of the module assembly shown in FIG3 at point A;

[0021] FIG5 shows a partial enlarged view of the module assembly shown in FIG3 at position B;

[0022] FIG6 is a schematic structural diagram of the module assembly shown in FIG3 with the side heat insulation members disassembled;

[0023] FIG7 shows a partial enlarged view of the module assembly shown in FIG6 at position C;

[0024] FIG8 is a schematic structural diagram of the module assembly shown in FIG3 without the side heat insulation member;

[0025] FIG9 shows a partial enlarged view of the module assembly shown in FIG8 at position D;

[0026] FIG10 shows a side view of the module assembly shown in FIG3 ;

[0027] FIG11 shows a top view of the module assembly shown in FIG3 ;

[0028] FIG12 shows a partial cross-sectional view of the module assembly shown in FIG11 along the EE direction;

[0029] FIG13 shows a top view of the module assembly shown in FIG3 without the upper cover;

[0030] FIG14 is a schematic structural diagram showing the upper cover, side insulation members and middle insulation members in the module assembly shown in FIG3 after being assembled in one direction;

[0031] FIG15 is a schematic structural diagram showing the upper cover, side insulation members and middle insulation members of the module assembly shown in FIG3 after being assembled in another direction;

[0032] FIG16 shows a schematic structural diagram of the end plate heat insulation component of the module assembly shown in FIG3 ;

[0033] FIG17 shows a partial enlarged view of the end plate insulation member at position F shown in FIG16 .

[0034] The above drawings include the following reference numerals:

[0035] 100. Module assembly;

[0036] 10. Battery cell assembly; 11. Battery cell combination; 111. Battery cell;

[0037] 20. Electrical assembly; 21. Busbar; 211. First avoidance hole; 22. Wire harness isolation plate; 221. Plate body; 222. Connecting protrusion; 223. First fastening hole;

[0038] 30. End plate; 31. Second fastening hole;

[0039] 40. End plate insulation; 41. Main plate body; 42. Insulation protection layer; 421. First plate body; 422. Second plate body; 43. Buffer layer;

[0040] 50. Upper cover; 51. Upper cover fastener; 52. Cover body; 53. First through hole;

[0041] 60. Top heat insulation; 61. Second avoidance hole;

[0042] 70. Side heat insulation member; 71. Side fastener; 72. Second through hole;

[0043] 80. Middle heat insulation; 81. Upper side;

[0044] 200, cable tie; 210, first cable tie; 220, second cable tie. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] As shown in Figures 1 to 17, the present invention provides a battery module, including a module assembly 100 and a cable tie 200 sleeved on the outside of the module assembly 100; the module assembly includes: a battery cell assembly 10, including at least one battery cell combination 11, the battery cell combination 11 includes a plurality of battery cells 111 arranged in sequence along a first direction; an electrical assembly 20, arranged above the battery cell assembly 10 and electrically connected to the battery cell assembly 10; two end plates 30, spaced apart along the first direction and respectively located on the battery cells 111; On opposite sides of the assembly 10, end plate insulation members 40 are provided between each end plate 30 and the battery cell assembly 10; the upper cover 50 is provided above the battery cell assembly 10 and the electrical assembly 20 and is fixedly connected to the electrical assembly 20, and a top insulation member 60 is provided between the upper cover 50 and the electrical assembly 20; two side insulation members 70 are arranged at intervals along the second direction and are respectively located on opposite sides of the battery cell assembly 10; wherein, the first direction and the second direction are perpendicular to each other and are both perpendicular to the vertical direction.

[0047] Compared with the battery modules in the prior art, the battery module of the present invention reduces the number and volume of components in the battery module while reducing costs by providing end plate insulation 40, top insulation 60 and side insulation 70, greatly reducing the total weight of the battery module and the required installation space, improving the grouping efficiency and energy density of the battery module, delaying or preventing the time for thermal runaway of the battery module, improving the safety performance of the battery module, and completely separating adjacent battery modules so that when thermal runaway occurs in the battery cell 111, the thermal runaway range can be controlled within a certain space, thereby achieving the purpose of preventing the battery module from thermal runaway or delaying the occurrence of thermal runaway, increasing the safety performance of the entire battery pack, and solving the problem of high thermal runaway risk of battery modules in the prior art.

[0048] As shown in Figure 16, the end plate insulation 40 of the present invention is composed of a composite of high-temperature resistant materials and fire-resistant materials. The end plate insulation 40 includes a main board body 41 located between the battery cell assembly 10 and the corresponding end plate 30. The two opposite sides of the main board body 41 spaced apart along the second direction are provided with insulating protective layers 42, and the side of the main board body 41 close to the corresponding end plate 30 is provided with a buffer layer 43. The buffer layer 43 includes a first part in contact with the main board body 41 and two second parts in contact with the two insulating protective layers 42 respectively; wherein, any two of the main board body 41, the insulating protective layer 42 and the buffer layer 43 are connected by double-sided adhesive.

[0049] As shown in Figure 17, the insulating protective layer 42 includes a first plate body 421 and a second plate body 422 that are perpendicular to and connected to each other. The first plate body 421 is located between the main plate 41 and the corresponding end plate 30, and the second plate body 422 is located between the battery cell assembly 11 and the corresponding side thermal insulation member 70.

[0050] Optionally, the main body 41 includes at least one of an epoxy board, a mica board and a plastic raw material board; and / or the insulating protective layer 42 includes at least one of ceramic silicone rubber, mica tape, ceramic glass fiber cloth, and basalt ceramic cloth; and / or the buffer layer 43 includes at least one of a foam layer and an aerogel layer.

[0051] Preferably, the main plate 41 of the present invention is an epoxy board, a high-temperature resistant insulating material that effectively blocks heat and current transfer between the battery cell assembly 10 and the end plate 30. This ensures insulation between the battery cell 111 and the end plate 30 even in the event of thermal runaway, thereby reducing safety risks. Alternatively, the main plate 41 can be made of other high-temperature resistant insulating materials, such as mica or plastic (i.e., LCP composite material).

[0052] Preferably, the two insulating protective layers 42 of the present invention are both ceramic silicone rubber, which are respectively arranged on both sides of the main board body 41 close to the two side thermal insulation parts 70 to wrap the corners of the battery cell 111, effectively isolating the battery cell 111 from the end plate 30, further playing a protective role, and can avoid the phenomenon of aggravated thermal runaway caused by short circuit between the battery cell 111 and the end plate 30 when thermal runaway occurs in the battery cell 111.

[0053] Preferably, the buffer layer 43 of the present invention is MPP foam (i.e. melamine foam) to play a role of buffering and heat preservation. In addition, the buffer layer 43 can also be a material with certain elasticity and heat preservation performance such as foam or aerogel of other materials.

[0054] Specifically, the upper cover 50 is made of mica board; and / or the thickness of the upper cover 50 is 1 mm to 2 mm; and / or the top thermal insulation 60 includes at least one of ceramic silicone rubber, mica tape, ceramic glass fiber cloth and basalt ceramic cloth; and / or the side thermal insulation 70 is made of mica board; and / or the thickness of the side thermal insulation 70 is 0.5 mm to 1.5 mm; and / or the opposite ends of the side thermal insulation 70 are fixedly connected to the two end plates 30 respectively; and / or there are multiple cable ties 200, and the multiple cable ties 200 are arranged at intervals in the vertical direction, and each cable tie 200 is arranged around the center line of the module assembly 100 extending in the vertical direction and is sleeved outside the module assembly 100; and / or an aerogel layer is provided between two adjacent battery cells 111 in the same battery cell combination 11.

[0055] The upper cover 50 of the present invention is a mica board, which can prevent the thermal runaway from damaging the upper shell of the entire battery pack when the battery cell 111 of the battery module has thermal runaway, thereby extending the safety time of the entire battery pack.

[0056] Preferably, the thickness of the upper cover 50 is 1 mm to 2 mm.

[0057] More preferably, the thickness of the upper cover 50 is 1.5 mm.

[0058] The top heat insulating member 60 of the present invention includes at least one of ceramic silicone rubber, mica tape, ceramic glass fiber cloth and basalt ceramic cloth.

[0059] Preferably, the top thermal insulator 60 is made of ceramic silicone rubber to cover the busbar 21. This ensures that when thermal runaway occurs in the battery cell 111, the high-temperature charged material ejected from the explosion-proof valve will only fall onto the ceramic silicone rubber and will not come into contact with the busbar 21. This reduces the risk of short-circuiting the busbar 21 and thus prevents the thermal runaway from worsening. Alternatively, the top thermal insulator 60 can be made of other fireproof and heat-insulating materials, such as mica tape, ceramic fiberglass cloth, and basalt ceramic cloth.

[0060] Preferably, the side heat insulation member 70 of the present invention is a mica board, which is used to prevent the heat and thermal runaway products from being transferred to the adjacent battery module when the battery cell is in thermal runaway. At the same time, the side heat insulation member 70 can play an insulating role when the battery cell 111 is in thermal runaway, so as to prevent the risk of thermal runaway from being aggravated by a short circuit between the battery module and the shell of the entire battery pack. The side heat insulation member 70 can also prevent the high-calorie substances in the battery cell 111 from erupting to the outside when the battery module is in thermal runaway, thereby avoiding the problem of thermal runaway of the battery module being aggravated by a short circuit caused by burning electrical components.

[0061] Preferably, the side heat insulating member 70 has a thickness of 0.5 mm to 1.5 mm.

[0062] More preferably, the thickness of the side heat insulating member 70 is 1 mm.

[0063] As shown in FIG3 , FIG4 , FIG6 and FIG7 , opposite ends of the side heat insulating member 70 are fixedly connected to the two end plates 30 , respectively, and the side heat insulating member 70 is bonded to the corresponding battery cells 111 by structural adhesive.

[0064] Specifically, the opposite ends of each side heat insulation member 70 spaced apart along the first direction are respectively provided with a second through hole 72 for one end of the side fastener 71 to pass through, and the opposite ends of each end plate 30 spaced apart along the second direction are respectively provided with a second fastening hole 31 for one end of the side fastener 71 to be inserted into. Each second fastening hole 31 passes through the corresponding second through hole 72 and is inserted into the corresponding second fastening hole 31 to fix the two side heat insulation members 70 and the two end plates 30 to be fixedly connected.

[0065] In the present invention, an aerogel layer is placed between two adjacent cells 111 in the same cell assembly 11. If thermal runaway occurs in one cell 111, the aerogel layer blocks heat transfer to the adjacent cell 111, reducing the risk of thermal runaway in the adjacent cell 111. Furthermore, the aerogel layer provides space for cyclic expansion of the cells 111, thereby extending the cycle life of the battery module.

[0066] As shown in Figures 1 and 2, the battery module of the present invention includes two cable ties 200, which are a first cable tie 210 and a second cable tie 220 located below the first cable tie 210; the first cable tie 210 is a steel cable tie, and the second cable tie 220 is a plastic cable tie (i.e., a PET cable tie).

[0067] As shown in Figures 2 and 12, the electrical assembly 20 includes: a busbar 21, which is arranged above the battery cell assembly 10 and electrically connected to each battery cell 111 in the battery cell assembly 10; a wiring harness isolation plate 22, which is arranged on the side of the busbar 21 close to the battery cell assembly 10 and fixedly connected to the upper cover 50 through the upper cover fastener 51; wherein, the top thermal insulation member 60 is located between the busbar 21 and the upper cover 50.

[0068] As shown in Figure 12, the wiring harness isolation plate 22 includes a plate body 221 and a connecting protrusion 222 connected to the plate body 221 and extending in a direction away from the battery cell assembly 10. The plate body 221 is located between the battery cell assembly 10 and the bus 21. The bus 21 is provided with a first avoidance hole 211 for avoiding the connecting protrusion 222. The connecting protrusion 222 passes through the first avoidance hole 211 and reaches the top of the bus 21; the upper cover 50 is provided with a first through hole 53 for one end of the upper cover fastener 51 to pass through, and the top heat insulation member 60 is provided with a second avoidance hole 61 for one end of the upper cover fastener 51 to pass through. The connecting protrusion 222 is provided with a first fastening hole 223 for inserting the upper cover fastener 51. One end of the upper cover fastener 51 passes through the corresponding first through hole 53 and the second avoidance hole 61 and is inserted into the corresponding first fastening hole 223 to fix the upper cover 50 and the wiring harness isolation plate 22. The battery cell assembly 10 of the present invention includes a plurality of battery cell assemblies 11 . The plurality of battery cell assemblies 11 are sequentially arranged along the second direction, and an intermediate heat insulating member 80 is provided between any two adjacent battery cell assemblies 11 .

[0069] Correspondingly, the upper cover 50 includes a plurality of cover bodies 52, and the plurality of cover bodies 52 are arranged one by one above the plurality of battery cell combinations 11, and the upper side surface 81 of the middle thermal insulation 80 is higher than the upper surface of the cover body 52; and / or the middle thermal insulation 80 is made of an epoxy board; and / or the thickness of the middle thermal insulation 80 is 1.5 mm to 2.5 mm.

[0070] In the embodiments shown in Figures 1 to 17 of the present invention, the battery cell assembly 10 includes two battery cell combinations 11, which are arranged sequentially along the second direction, and an intermediate thermal insulation member 80 is provided between the two battery cell combinations 11; the upper cover 50 includes two cover bodies 52, and the two cover bodies 52 are arranged one-to-one above the two battery cell combinations 11, and the upper side surface 81 of the intermediate thermal insulation member 80 is higher than the upper surface of the two cover bodies 52.

[0071] Specifically, the middle heat insulating member 80 of the present invention is an epoxy board.

[0072] Preferably, the thickness of the middle heat insulating member 80 is 1.5 mm to 2.5 mm.

[0073] More preferably, the thickness of the middle heat insulating member 80 is 2 mm.

[0074] In this way, the setting of the middle thermal insulation 80 divides the battery module into multiple independent spaces, with only one battery cell combination 11 set in each space. When the battery cell 111 in one battery cell combination 11 sprays fire toward another adjacent battery cell combination 11 due to thermal runaway, the middle thermal insulation 80 can isolate and block the flame to avoid heat transfer between adjacent battery cell combinations 11, thereby reducing the loss of the battery module caused by thermal runaway.

[0075] In addition, the number of battery cells 111 in the battery module of the present invention can be flexibly set according to the different overall space of the battery pack to form battery modules of different lengths, which can be applicable to battery packs of more types and sizes, thereby improving the energy density of the battery module.

[0076] The assembly process of the battery module of the present invention is as follows:

[0077] Place an end plate 30 (on which an end plate heat insulation member 40 has been installed) → stack the first row of battery cells 111 on one side of the end plate 30 to form a first battery cell combination 11 → paste the middle heat insulation member 80 on one side of the width direction of the first battery cell combination 11 → stack the second row of battery cells 111 on the side of the middle heat insulation member 80 away from the first battery cell combination 11 to form a second battery cell combination 11 → place another end plate 30 (on which another end plate heat insulation member 40 has been installed) → place the electrical assembly 20 on the battery assembly 11. The battery assembly 11 is mounted on the positive and negative poles of each battery cell 111, and the bus bar 21 is welded. The top heat insulation member 60 is installed above the electrical assembly 20. The two side heat insulation members 70 are installed, and both ends of each side heat insulation member 70 are connected to the two end plates 30 through the side fasteners 71. The first tie 210 (i.e., steel tie) and the second tie 220 (i.e., plastic tie) are sequentially mounted on the two side heat insulation members 70 and the two end plates 30. The two cover bodies 52 of the upper cover 50 are connected to the electrical assembly 20 using the upper cover fasteners 51.

[0078] The utility model also provides a battery pack, comprising the above-mentioned battery module.

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] The battery module of the present invention includes a module assembly 100 and a cable tie 200 sleeved on the outside of the module assembly 100; the module assembly includes: a battery cell assembly 10, including at least one battery cell combination 11, the battery cell combination 11 includes a plurality of battery cells 111 arranged in sequence along a first direction; an electrical assembly 20, arranged above the battery cell assembly 10 and electrically connected to the battery cell assembly 10; two end plates 30, spaced apart along the first direction and respectively located on opposite sides of the battery cell assembly 10, and an end plate thermal insulation member 40 is provided between each end plate 30 and the battery cell assembly 10; an upper cover 50, arranged above the battery cell assembly 10 and the electrical assembly 20 and fixedly connected to the electrical assembly 20, and a top thermal insulation member 60 is provided between the upper cover 50 and the electrical assembly 20; two side thermal insulation members 70, spaced apart along the second direction and respectively located on opposite sides of the battery cell assembly 10; wherein the first direction and the second direction are perpendicular to each other and both perpendicular to the vertical direction. Compared with the battery modules in the prior art, the battery module of the present invention reduces the number and volume of components in the battery module while reducing costs by providing end plate insulation 40, top insulation 60 and side insulation 70, greatly reducing the total weight of the battery module and the required installation space, improving the grouping efficiency and energy density of the battery module, delaying or preventing the time for thermal runaway of the battery module, improving the safety performance of the battery module, and completely separating adjacent battery modules so that when thermal runaway occurs in the battery cell 111, the thermal runaway range can be controlled within a certain space, thereby achieving the purpose of preventing the battery module from thermal runaway or delaying the occurrence of thermal runaway, increasing the safety performance of the entire battery pack, and solving the problem of high thermal runaway risk of battery modules in the prior art.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0083] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0084] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0085] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

DEPCT67 1. A type of battery module, characterized by being composed of a set of modules (100) and straps. (200) that enclose the module set (100) The module set consists of: A battery cell pack (10) consists of at least one battery cell combination (11). Combined, the battery cell (11) consists of several battery cells (111) arranged in a specific direction. number one The electrical unit (20) is mounted on top of the battery cell assembly (10) and is electrically connected to the cell assembly. Battery (10) The two end plates (30) are spaced apart in the first direction and mounted on the opposite side. The cross-section of the battery cell pack (10) in order has the end plate heat shield (40) installed. Between each end plate (30) and the battery cell assembly (10) The top cover (50) is mounted on top of the battery cell pack (10) and the electrical pack (20) and Securely connected to the electrical assembly (20), with the top heat shield (60) installed between the lid. Top cover (50) and electrical assembly (20) Two side heat shield pieces (70) are spaced apart in the second direction and attached. Located on opposite sides of the battery cell pack (10), respectively. Where the first and second directions are perpendicular to each other and both are perpendicular to the vertical direction.

2. The battery module under claim 1 is characterized by a heat shield on the plate. The end (40) consists of the motherboard (41) which is mounted between the battery cell pack (10) and the plate. The end (30) that is connected to the opposite side of the motherboard (41) that is arranged in a spaced pattern in the second direction has The installation of the insulation layer (42) on the motherboard side (41) near the relevant end plate (30) is Install the protective layer (43) 3. The battery module under claim 2 has the following characteristics: the insulation layer (42) mentioned above. It consists of a section of the first sheet (421) and a section of the second sheet (422) that are perpendicular and connected to each other. The first plate (421) is located between the main board (41) and the associated end plate (30). The portion of the plate Two (422) are located between the battery cell assembly (11) and the side heat shield (70). Related 4. The battery module under claim number 2 has the following characteristics: The motherboard (41) consists of at least epoxy sheets, mica sheets, and plastic sheets. One item and / or The insulation layer (42) consists of ceramic silicone rubber, mica adhesive strips, and fiber cloth. At least one item of glass ceramic and basalt ceramic fabric, and / or The protective layer (43) consists of at least one foam and aerogel layer.

5. The battery module under claim 1 has the following characteristics: Top cover (50) made of mica sheet and / or The thickness of the top cover (50) is between 1mm and 2mm and / or The top heat shield (60) consists of silicone rubber, ceramic, mica adhesive strip, fire cloth. At least one item of berglass ceramic and basalt ceramic fabric, and / or Side heat shield (70) is made of mica sheet and / or The thickness of the side heat shield (70) is between 0.5mm and 1.5mm and / or The opposite ends of the side heat shield (70) are firmly connected to the plate. Both ends (30) respectively and / or The number of straps (200) is multiple. These multiple straps (200) are arranged spaced apart as follows: Vertical direction: Each strap (200) wraps around the center line that extends in the vertical direction of the module set (100). and located outside the module set (100) and / or Between two adjacent battery cells (111) in combination, the same battery cell (11) An arogen layer is installed.

6. The battery module under claim 1 is characterized as follows: The power unit (20) consists of: The busbar (21) is mounted on top of the battery cell assembly (10) and is electrically connected to each. Battery cells (111) in a battery cell pack (10) A cable barrier (22) is installed on one side of the busbar (21) near the battery cell assembly (10) and Securely connected to the top cover (50) via the top cover fasteners (51). The top heat shield (60) is installed between the busbar (21) and the top cover. (50) 7. The battery module under claim number 6 has the following characteristics: The cable barrier (22) consists of the plate body (221) and the protruding connecting part (222) at Connect to the plate (221) and extend in the direction away from the battery cell assembly (10). Plate (221) It is installed between the battery cell assembly (10) and the busbar (21). On the busbar (21) there is one recessed hole (211) which is used. To avoid the protruding connection (222), the protruding connection (222) passes through the first bypass hole (211). And arrive at the top of the busbar (21). The top cover (50) has one (53) through hole installed for one end of the cover fastener. The top (51) is pass-through. On the connecting protrusion (222), a first mounting hole (223) is installed for Insert one side of the top cover fastener (51) through the first through hole (53). The relevant part is then inserted into the first mounting hole (223) to ensure the top cover (50) is firmly connected. Thick with cable barrier (22) 8. The battery module under claim 1 is characterized as a battery cell pack (10). It consists of several battery cell combinations (11). Each battery cell combination (11) Arranged in the second direction, between two adjacent battery cell combinations (11) there is Install the heat shield in the center (80).

9. The battery module under claim 8 has the following characteristics: The top cover (50) consists of several covers (52). These several covers (52) are located at The top of each set of battery cells (11) in sequence, the top (81) of the insulation parts. Heat the center (80) higher than the top surface of the lid (52) and / or The central heat shield (80) is made of epoxy sheet and / or The thickness of the central heat shield (80) is between 1.5mm and 2.5mm.

10. A type of battery pack has a specific characteristic: it consists of battery modules as described in which of the following options? One of the claims 1-9.

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