CN221126154U - Battery assembly and battery module - Google Patents

Abstract

The utility model discloses a battery assembly and a battery module. Along on the free thickness direction of battery, the free opposite sides of battery all compress tightly and are provided with the elastic cushion, battery monomer and elastic cushion equipment are a subassembly, this subassembly is binded through the sticky tape back, set up in holding the intracavity, thereby can combine through sticky tape and elastic cushion, make the elastic cushion continuously apply certain compressive force to the battery monomer, with the effect of the degree of reducing the free expansion of taking place along the ascending size of thickness direction of battery, make battery pack can be applicable to work in the vacuum environment, simultaneously, because elastic cushion can take place elastic deformation, in order to make the free each position of surface of self closely laminate in the free each position of battery respectively, thereby apply more even compressive force to the free each position of battery, in order to make battery monomer be difficult for breaking, battery pack's safety in use is better, life is longer.

Description

Battery assembly and battery module

Technical Field

The present disclosure relates to battery technology, and particularly to a battery assembly and a battery module.

Background

In order to apply the battery to the aerospace vehicle, the battery cell is generally required to be arranged in a sealed hard shell, so that the inside of the sealed hard shell is kept in a non-vacuum state, and the battery cell works normally, so that a battery assembly formed by the battery cell and the hard shell is suitable for working in a vacuum environment.

In the use process of the battery monomer, the dimension change along the thickness direction often occurs, especially when the battery monomer is a metal lithium battery, the thickness of the battery monomer can be greatly expanded or contracted in the charge and discharge process, namely, the respiratory effect of the battery. The respiration effect is unfavorable for the charge and discharge cycle of the battery cell, and the battery cell can be caused to break the hard shell, so that the battery assembly is scrapped, therefore, in the related art, the end plate is often arranged on two opposite sides of the battery cell, and then the end plate and the battery cell are bundled through the strapping tape, so that the end plate is tightly pressed on the two opposite sides of the battery cell, and the degree of dimensional expansion of the battery cell along the thickness direction in the use process is reduced.

However, because of the contact surfaces of two adjacent battery cells, the contact tightness difference at different positions is large, and especially when the battery cells expand, the problem that the local contact of the two adjacent battery cells is too tight, so that the contact force is concentrated at the position, and the position of the battery cells is easy to crack is easily caused.

Disclosure of utility model

One object of the present utility model is to: the battery assembly is applicable to work in a vacuum environment, meanwhile, stress at different positions of the battery unit included in the battery assembly is uniform, the battery unit is not easy to crack, the use safety of the battery assembly is better, and the service life of the battery assembly is longer.

Another object of the utility model is: the battery module is better in use safety and longer in service life by arranging the battery assembly.

In order to achieve the purpose, the utility model adopts the following technical scheme:

in a first aspect, there is provided a battery assembly comprising:

The shell is provided with a containing cavity, and at least one side surface of the shell is provided with an opening communicated with the containing cavity;

The cover plate is connected to the shell, seals the opening and is provided with a pole;

The battery cell is electrically connected to the pole; the battery unit is provided with an elastic pad in a compressing mode on at least one side face of the battery unit, the battery unit and the elastic pad are assembled into a component, and the component is arranged in the accommodating cavity after being bound by the first binding belt.

As a preferable technical scheme of the battery assembly, the battery assembly includes a plurality of battery cells stacked, and one elastic pad is disposed between at least one pair of adjacent two battery cells in a thickness direction of any one of the battery cells.

As a preferred technical scheme of the battery assembly, the battery assembly further comprises an electric connection plate, the electric connection plate is arranged between the battery cells and the cover plate, the electric connection plate comprises an insulation part and a plurality of conductive parts, a plurality of through grooves are formed in the insulation part at intervals, the conductive parts are respectively arranged in the through grooves and connected with the insulation part, the conductive parts are electrically connected with the pole, and the battery cells are respectively connected between two of the conductive parts.

As a preferred technical scheme of the battery assembly, the battery assembly further comprises two first end plates, the first end plates are made of nonmetal materials, the two first end plates are respectively arranged on two opposite sides of the assembly along the thickness direction of the battery unit, and the assembly and the first end plates are integrally bound by the first binding belt.

As a preferred technical solution of the battery assembly, the battery assembly further includes an electrical connection plate, the electrical connection plate is disposed between the battery cells and the cover plate, the electrical connection plate is electrically connected to the pole, and all the battery cells are electrically connected to one electrical connection plate;

Along the thickness direction of the battery monomer, two opposite sides of the electric connection plate are respectively connected with the two first end plates in a mortise and tenon mode.

As a preferred technical scheme of the battery assembly, the side edge of the electric connection plate is convexly provided with a first clamping protrusion, the side edge of the first end plate is provided with a first clamping groove, the first clamping protrusion is clamped in the first clamping groove, and/or the side edge of the electric connection plate is provided with a second clamping groove, the side edge of the first end plate is convexly provided with a second clamping protrusion, and the second clamping protrusion is clamped in the second clamping groove.

As a preferable technical solution of the battery assembly, two opposite sides of the electric connection plate are respectively adhered to the two first end plates.

As a preferable technical scheme of the battery assembly, the battery unit includes a battery body, and a positive electrode tab and a negative electrode tab which are arranged on the battery body at intervals, the battery assembly includes a positive electrode post and a negative electrode post, the positive electrode tab is electrically connected to the positive electrode post, and the negative electrode tab is electrically connected to the negative electrode post;

The battery assembly further comprises an insulating piece, and the insulating piece is arranged between the adjacent pair of lugs.

As a preferable technical scheme of the battery assembly, the battery cell is adhered to the adjacent elastic pad; and/or the number of the groups of groups,

The first strapping is made of nonmetal materials.

As a preferable technical scheme of the battery assembly, the opening is formed on one side surface of the housing, and the battery assembly comprises the cover plate;

A first buffer layer is arranged between the bottom surface and the side wall of the accommodating cavity; and/or a second buffer layer is arranged between one side of the battery monomer, which is away from the cover plate, and the shell; and/or, the shell is also connected with a limiting structure, the limiting structure is positioned in the accommodating cavity, and the limiting structure can limit the position of one side, close to the cover plate, of the battery cell.

In a second aspect, a battery module is provided, including at least one battery pack, the battery pack includes a plurality of battery modules according to the technical scheme of the aforesaid first aspect, at least two second end plates and second strapping, a plurality of battery modules are arranged in proper order and form a battery module whole, just the second end plates set up at least in the holistic opposite sides of battery module, the battery module whole with the periphery of second end plates is passed through the second strapping and is tied up.

The beneficial effects of the utility model are as follows:

Through all compressing tightly setting up the elastic cushion in the free thickness direction of battery on the free opposite side of battery to tie up battery and elastic cushion wholly through first strapping, with combine through first strapping and elastic cushion, constantly apply certain compressive force to battery monomer through the elastic cushion, with the effect of the degree that reduces the free expansion of battery monomer along the ascending size of thickness direction of realization, promote the free charge-discharge cycle life of battery, and avoid the battery monomer to excessively expand and break hard casing, thereby make battery pack can be applicable to and work in vacuum environment, simultaneously, because elastic cushion can take place elastic deformation, so that each position on self surface closely laminates in the free each position of battery respectively, thereby apply more even compressive force to the free each position of battery, so that battery monomer is difficult for breaking, battery pack's safety in use is better, life is longer.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of a battery assembly according to an embodiment.

Fig. 2 is a schematic exploded view of a battery assembly according to an embodiment.

Fig. 3 is a schematic perspective view of a battery cell, an elastic pad, a first end plate, a first strapping tape, and an electrical connection plate according to an embodiment.

Fig. 4 is an exploded view of a battery cell, a spring pad, a first end plate, a first strapping tape, and an electrical connection plate according to an embodiment.

Fig. 5 is a schematic perspective view of a first end plate and an electrical connection plate according to an embodiment.

Fig. 6 is a schematic perspective view of a battery module according to an embodiment.

In the figure:

1. a battery assembly; 1a, assembly; 10. a housing; 100. a receiving chamber; 101. an opening; 11. a cover plate; 11a, a pole; 110. a positive electrode post; 111. a negative electrode column; 12. a battery cell; 120. a battery body; 121. a tab; 121a, positive electrode tab; 121b, negative electrode ear; 13. an elastic pad; 14. a first strapping tape; 15. an electrical connection board; 150. an insulating part; 150a, through grooves; 150b, a first clamping groove; 151. a conductive portion; 151a, a setting hole; 16. a first end plate; 160. the first clamping protrusion; 17. an insulating member; 18. a second buffer layer;

2. a battery module; 20. a battery pack; 201. a second end plate; 202. and a second strapping tape.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1 and 2, the present utility model provides a battery assembly 1, which includes a housing 10, at least one cover plate 11, a battery cell 12, an elastic pad 13, and a first strapping 14. The casing 10 has a housing cavity 100, and at least one side surface of the casing 10 is provided with an opening 101 communicated with the housing cavity 100, the cover plate 11 is connected to the casing 10, the cover plate 11 seals the opening 101, at least one cover plate 11 is provided with a pole 11a, the battery cell 12 is electrically connected to the pole 11a, the battery cell 12 can include, but is not limited to, a lithium metal battery, a lithium ion battery and the like, an elastic pad 13 is pressed and arranged on at least one side surface of the battery cell 12 along the thickness direction T of the battery cell 12, the battery cell 12 and the elastic pad 13 are assembled into a component 1a, and the component 1a is arranged in the housing cavity 100 after being bundled by a first bundling belt 14, wherein an arrow in fig. 2 shows the thickness direction T.

Through along the thickness direction T of battery cell 12, compress tightly the elastic cushion 13 that sets up at the both sides of battery cell 12 to with battery cell 12 and elastic cushion 13 are whole to tie up through first strapping 14, with combine with elastic cushion 13 through first strapping 14, constantly exert certain compressive force to battery cell 12 through elastic cushion 13, in order to realize reducing the effect that the degree of size expansion in the thickness direction T takes place for battery cell 12, promote battery cell 12's charge-discharge cycle life, and avoid battery cell 12 excessive expansion and break hard casing 10, thereby make battery pack 1 can be applicable to and work in the vacuum environment, simultaneously, because elastic cushion 13 can take place elastic deformation, so that each position of self surface closely laminates in each position of battery cell 12 respectively, thereby exert more even compressive force to each position of battery cell 12, so that battery cell 12 is difficult for breaking, battery pack 1's safety in use is better, and life is longer.

Alternatively, the battery assembly 1 includes two posts 11a, the two posts 11a are a positive post 110 and a negative post 111, respectively, and the battery cell 12 is electrically connected between the Yu Zhengji posts 110 and the negative post 111.

Alternatively, the case 10 may have the opening 101 formed at only one side, and the battery assembly 1 may include only one cap plate 11 having the positive electrode posts 110 and the negative electrode posts 111 spaced apart.

Alternatively, the casing 10 may be provided with openings 101 on at least two sides, and at this time, the battery assembly 1 may include at least two cover plates 11, where one cover plate 11 is provided with a positive electrode post 110 and a negative electrode post 111 at intervals, or the positive electrode post 110 and the negative electrode post 111 are respectively provided on the two cover plates 11.

Alternatively, the battery cells 12 and the elastic pads 13 may be stacked and combined into the assembly 1a, in other words, the battery cells 12 and the elastic pads 13 may not be fixed, or the battery cells 12 and the adjacent elastic pads 13 may be bonded to be combined into the assembly 1a, so that the relative positional relationship between the battery cells 12 and the adjacent elastic pads 13 is stable, and the pressing force applied by the elastic pads 13 to the battery cells 12 is stable.

Alternatively, the elastic pad 13 may be made of a material capable of providing a larger elastic force when the compression amount is smaller, such as a rubber material, a silica gel material, a plastic material, etc. with a larger compression strength, so that the elastic pad 13 can continuously apply a larger pressing force to the battery cell 12, and the effect of preventing the battery cell 12 from expanding in the thickness direction T is better.

Alternatively, the first strapping 14 is made of a non-metal material, so that the weight of the first strapping 14 is lighter, and the battery assembly 1 as a whole can be designed to be lighter.

Preferably, the first strapping 14 may be a glass fiber strapping having a relatively high tensile strength, so that the first strapping 14 can achieve strapping of the compacted spring pad 13 with the battery cell 12 and maintain the spring pad 13 in a compressed state.

Alternatively, the first strapping 14 may be adhesive tape, so that the first strapping 14 can be adhered to the battery cell 12 and the elastic pad 13 while strapping the battery cell 12 and the elastic pad 13 together, so that the structure of the battery cell 12, the elastic pad 13 and the first strapping 14 is more stable.

As shown in fig. 2 to 4, the battery assembly 1 may include one battery cell 12 or include a plurality of battery cells 12 disposed in a stacked manner, and when the battery assembly 1 includes a plurality of battery cells 12 disposed in a stacked manner, optionally, one elastic pad 13 is disposed between at least one pair of adjacent two battery cells 12, that is, at least one pair of adjacent two battery cells 12 share one elastic pad 13, so that the number of elastic pads 13 included in the battery assembly 1 can be reduced while the plurality of battery cells 12 are subjected to a relatively uniform pressing force exerted by the elastic pad 13, so that the battery assembly 1 is lighter.

Optionally, the battery assembly 1 further includes an electrical connection plate 15, where the electrical connection plate 15 is disposed between the battery cells 12 and the cover plate 11, the electrical connection plate 15 is electrically connected to the post 11a (i.e. electrically connected between the positive post 110 and the negative post 111), and all the battery cells 12 are electrically connected to one electrical connection plate 15, so that the plurality of battery cells 12 can be electrically connected through the electrical connection plate 15, and the plurality of battery cells 12 are integrally connected between the positive post 110 and the negative post 111, so that each battery cell 12 is electrically connected between the Yu Zhengji post 110 and the negative post 111.

Specifically, the electrical connection plate 15 includes an insulating portion 150 and a plurality of conductive portions 151, a plurality of through slots 150a are disposed on the insulating portion 150 at intervals, each conductive portion 151 is disposed in each through slot 150a and connected to the insulating portion 150, the conductive portions 151 are electrically connected to the pole 11a, that is, at least one conductive portion 151 is electrically connected to the positive pole 110, another at least one conductive portion 151 is electrically connected to the negative pole 111, and each battery cell 12 is connected between two conductive portions 151 in the conductive portions 151.

In the process of assembling the battery assembly 1, the plurality of battery cells 12 can be welded to the conductive parts 151 first, then the plurality of battery cells 12 and the electric connection plate 15 are integrally placed in the accommodating cavity 100, finally the cover plate 11 is covered on the opening 101, the positive pole column 110 and the negative pole column 111 are respectively abutted to the two conductive parts 151, the plurality of battery cells 12 are not required to be directly welded between the positive pole column 110 and the negative pole column 111, on one hand, the plurality of battery cells 12 can be electrically connected through the electric connection plate 15 by using a more complex circuit, on the other hand, the cover plate 11 is not required to be welded with the battery cells 12 in advance, and therefore, when the cover plate 11 is covered on the opening 101, structural traction between the cover plate 11 and the battery cells 12 is not required to be considered, so that the cover plate 11 is simple in cover setting process.

Optionally, the battery assembly 1 further includes two first end plates 16, along the thickness direction T of the battery cell 12, the two first end plates 16 are respectively disposed on two opposite sides of the assembly 1a, the assembly 1a and the first end plates 16 are integrally bound by the first binding tape 14, and the assembly 1a, the first end plates 16 and the first binding tape 14 are integrally disposed in the accommodating cavity 100, so that the pressure applied to the elastic pad 13 at each position is more balanced from the two opposite sides of the assembly 1a through the two first end plates 16, so that the compression force applied to the battery cell 12 at each position of the elastic pad 13 is more balanced.

Preferably, the first end plate 16 is made of a non-metal material, for example, a high-strength carbon fiber material, a high-strength plastic material, etc., so that the weight of the first end plate 16 is small, which is advantageous for the lightweight design of the battery assembly 1.

As shown in fig. 3 to 5, alternatively, two opposite sides of the electric connection plate 15 (i.e., two opposite sides of the insulating portion 150) are respectively connected to the two first end plates 16 in a mortise-tenon manner along the thickness direction T of the battery cell 12, so that, on one hand, the required arrangement and installation space of the connection structure of the electric connection plate 15 and the first end plates 16 is smaller, and both the electric connection plate 15 and the first end plates 16 can be designed to be lighter and thinner, so as to facilitate lighter weight of the battery assembly 1, and on the other hand, when the battery cell 12 expands or contracts slightly along the thickness direction T, the relative positions of the portions of the electric connection plate 15 and the first end plates 16 away from each other are changed to a certain extent while one side of the battery cell 12 is being connected, so as to avoid fracture caused by larger stress at the connection position of the first end plates 16 and the electric connection plate 15 when the battery cell 12 expands or contracts.

Illustratively, the side edge of the electrical connection board 15 (i.e., the side edge of the insulating portion 150) is convexly provided with a first clamping protrusion 160, the side edge of the first end board 16 is provided with a first clamping groove 150b, the first clamping protrusion 160 is clamped to the first clamping groove 150b, or the side edge of the electrical connection board 15 (i.e., the side edge of the insulating portion 150) is provided with a second clamping groove (not shown in the figure), the side edge of the first end board 16 is convexly provided with a second clamping protrusion (not shown in the figure), the second clamping protrusion is clamped to the second clamping groove, or the side edge of the electrical connection board 15 (i.e., the side edge of the insulating portion 150) is convexly provided with a first clamping protrusion 160, the side edge of the first end board 16 is provided with a first clamping groove 150b, and the side edge of the electrical connection board 15 (i.e., the side edge of the insulating portion 150) is provided with a second clamping groove (not shown in the figure), so as to realize that one side of the electrical connection board 15 and one side of the first end board 16 are in mortise-and-tenon connection.

Optionally, when the electric connection board 15 is provided with the first clamping protrusion 160 and the first end board 16 is provided with the first clamping groove 150b, the first clamping protrusion 160 and the first clamping groove 150b may be multiple, and the first clamping protrusions 160 and the first clamping grooves 150b are in one-to-one correspondence, when the electric connection board 15 is provided with the second clamping groove and the first end board 16 is provided with the second clamping protrusion, the second clamping protrusions and the second clamping grooves may be multiple, and the second clamping protrusions and the first clamping grooves 150b are in one-to-one correspondence, so that the connection stability between the electric connection board 15 and the first end board 16 is better by increasing the number of structures of the connected structures.

Further, the two opposite sides of the electric connection plate 15 are respectively adhered to the two first end plates 16, so that the connection stability between the electric connection plate 15 and the first end plates 16 is further reinforced, and the contact of the electric connection plate 15 and the first end plates 16 with the mortise-tenon connection is avoided in the use process.

Optionally, the battery cell 12 includes a battery body 120, and a positive electrode tab 121a and a negative electrode tab 121b disposed on the battery body 120 at intervals, the positive electrode tab 121a is electrically connected to the Yu Zhengji column 110, and the negative electrode tab 121b is electrically connected to the negative electrode column 111.

When the battery assembly 1 further includes the electrical connection plate 15 as in the foregoing embodiments, the positive electrode tab 121a and the negative electrode tab 121b of each battery cell 12 may be connected to two conductive portions 151 of the plurality of conductive portions 151, respectively.

Alternatively, the conductive portion 151 may be provided with a plurality of sequentially arranged setting holes 151a, and when assembled, the positive tab 121a and the negative tab 121b are inserted into the corresponding setting holes 151a from one side of the electric connection plate 15, and then the positive tab 121a and the negative tab 121b are welded to the walls of the corresponding setting holes 151a from the other side of the electric connection plate 15, so as to facilitate the electrical connection of the positive tab 121a and the negative tab 121b to the corresponding conductive portion 151.

Since the battery body 120 may expand or contract in the thickness direction T during use, in order to avoid tearing of the tab 121 of the battery cell 12 (i.e., the positive tab 121a and the negative tab 121b of the battery cell 12) during use, the length of the tab 121 of the battery cell 12 may be optionally longer.

However, such arrangement may result in the tabs 121 of the adjacent battery cells 12 being easily contacted in the thickness direction T of the battery body 120 to be electrically connected, and when the adjacent pair of tabs 121 of the adjacent battery cells 12 are electrically connected to the same conductive portion 151 in the thickness direction T, the pair of tabs 121 are electrically connected through the conductive portion 151, and thus, the electrical circuit formed by the electrical connection of the plurality of battery cells 12 through the electrical connection plate 15 is not affected by the non-insulation between the pair of tabs 121, and when the adjacent pair of tabs 121 of the adjacent battery cells 12 are electrically connected to two different conductive portions 151, respectively, the electrical circuit formed by the electrical connection plate 15 is affected by the non-insulation between the pair of tabs 121.

Based on this, the battery assembly 1 optionally further includes an insulating member 17, and the insulating member 17 may include, but is not limited to, insulating foam, insulating rubber, insulating plastic, and an insulating member 17 is disposed between adjacent and insulated pair of tabs 121 in the thickness direction T of the battery body 120.

As shown in fig. 2 to 4, when the opening 101 is formed at one side surface of the case 10 in the above-described technical scheme and the battery assembly 1 includes a cover plate 11, in order to prevent the battery body 120 from being damaged by collision with the case 10 during use, a first buffer layer (not shown) is optionally provided between the bottom surface and the sidewall of the receiving chamber 100, so that buffering can be formed by the first buffer layer, and the battery body 120 is protected from sharp edges of the bottom of the cover plate 11 when the bottom of the battery body 120 collides with the case 10.

For example, a soft paste may be disposed between the bottom surface and the sidewall of the receiving chamber 100 to form the first buffer layer by the soft paste and enable the first buffer layer to be fixed at a position between the bottom surface and the sidewall of the receiving chamber 100.

Alternatively, a second buffer layer 18 is disposed between the side of the battery body 120 facing away from the cover plate 11 and the case 10, and the second buffer layer 18 may include, but is not limited to, a buffer foam block, a buffer rubber block, and a buffer foam block, so as to protect the bottom surface of the battery body 120 when the bottom of the battery body 120 collides with the case 10.

Still alternatively, the housing 10 is further connected with a limiting structure (not shown in the drawings), and the limiting structure is located in the accommodating cavity 100, and the limiting structure can limit the relative position between the side of the battery body 120, which is close to the cover plate 11, and the housing 10, so as to avoid the battery body 120 from colliding with the housing 10.

The limiting structure includes a structure formed by curing adhesive, and the side, close to the cover plate 11, of the battery body 120 is bonded to the housing 10 through the limiting structure, so that the limiting effect of the limiting structure is more stable.

Preferably, the limiting structure can be formed by soft glue solidification, so that the battery body 120 and the shell 10 can be bonded through the limiting structure, and the battery body 120 can generate small-amplitude relative motion with the shell 10 due to the soft glue solidification, and the battery body 120 can avoid tearing of a part of the battery body 120 bonded to the shell 10 when the small-amplitude respiration effect occurs in the shell 10.

In other embodiments, the limiting structure may further include a bump or a collar disposed on a side wall of the housing 10, a bump or a collar disposed on the cover 11, and a spring block, a spring collar, a spring or a spring sheet compressed between the battery body 120 and the cover 11.

Preferably, any two of the above-mentioned alternative solutions may be adopted simultaneously, or the above-mentioned three alternative solutions may be adopted simultaneously, so as to more comprehensively protect the battery body 120, thereby making the battery body 120 less prone to breakage during use.

As shown in fig. 6, the present utility model provides a battery module 2, which includes at least one battery pack 20, and the battery pack 20 includes a plurality of battery modules 1 as described in the foregoing technical aspects, and the battery module 2 can be designed to be more lightweight due to the lighter weight of the battery modules 1.

In addition, the battery pack 20 further includes at least two second end plates 201 and second strapping bands 202, the plurality of battery packs 1 are sequentially arranged in the thickness direction T of the battery cells 12 (see fig. 2) of the battery pack 1 to form the whole battery pack 1, and the second end plates 201 are disposed at least on opposite sides of the whole plurality of battery packs 1, and the whole plurality of battery packs 1 and the outer periphery of the whole second end plates 201 are strapped by the second strapping bands 202, so that the plurality of battery packs 1 can be connected to form one unit by the second strapping bands 202, and on the other hand, when the expansion of the battery cells 12 in the thickness direction T occurs to cause the expansion of the battery pack 1 in the thickness direction T, the plurality of battery packs 1 can be further pressed against the expansion of the battery pack 1, thereby further avoiding the case 10 (see fig. 2) being ruptured by the battery cells 12, resulting in the case 10 being difficult to maintain the non-vacuum state inside, so that the battery pack 2 is suitable for use as an apparatus for use in an aircraft, spacecraft or the like, including the apparatus for use as a power source.

Further, by arranging the plurality of battery packs 1 in order in the thickness direction T and bundling the second bundling tape 202 around the plurality of battery packs 1 and the entire outer circumferences of the two second end plates 201, the cover plates 11 of the plurality of battery packs 1 can be positioned on the same side, and the surfaces of the cover plates 11 are not covered with the second bundling tape 202, thereby facilitating the access of the plurality of battery packs 1 into an external circuit through the positive electrode post 110 and the negative electrode post 111 on the cover plates 11 for charge and discharge.

Optionally, the second strapping 202 may be one or more, and when the second strapping 202 is multiple, the multiple second strapping 202 are disposed at intervals along the opposite direction of the cover plate 11 and the battery cell 12, so that the strapping scope of the second strapping 202 can be larger along the opposite direction of the cover plate 11 and the battery cell 12, and meanwhile, compared with the second strapping 202 with a larger width, the second strapping 202 can be made to use less material of the battery pack 20, on one hand, the material cost of the battery pack 20 can be reduced, and on the other hand, the battery pack 20 can be lighter.

Alternatively, the second end plate 201 may be a plate made of metal, such as a steel plate, so that it can have a relatively high structural strength to apply a relatively high pressing force to the battery assembly 1 on the one hand, and can also provide a certain protection to the battery assembly 1 on the other hand. Further, by bundling and fixing the plurality of battery modules 1 by using the pair of metal second end plates 201 and the second bundling tape 202, the battery module 2 as a whole can be made lighter than a case where bundling is performed by using metal end plates and bundling tapes for each battery module 1.

Alternatively, the second strapping 202 may be a metal strapping, such as a steel strap, so as to have a large structural strength to be able to apply a large pressing force to the battery assembly 1. Further, the plurality of battery modules 1 are bound and fixed together by using the second binding tape 202 made of a metal material, so that the battery module 2 as a whole can be made lighter than a case where binding tapes made of a metal material are used for each of the battery modules 1.

When the battery module 2 includes a plurality of battery packs 20, the plurality of battery packs 20 are optionally arranged in a direction perpendicular to the thickness direction T of the battery cells 12, thereby arranging a plurality of battery modules 1 included in the battery module 2 in an array so that the structure of the battery module 2 is more compact.

Alternatively, the number of the battery packs 1 included in the different battery packs 20 may be different, and the lengths of the second strapping 202 included in the corresponding different battery packs 20 may be different, so that the sizes of the different battery packs 20 may be different along the arrangement direction of the plurality of battery packs 1, so that the shape of the battery module 2 formed by combining the plurality of battery packs 20 can be adjusted by adjusting the number of the battery packs 1 included in each battery pack 20, in other words, the shape of the battery module 2 may be more flexibly adjusted according to the actual arrangement space.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (11)

1. A battery assembly, comprising:

The shell is provided with a containing cavity, and at least one side surface of the shell is provided with an opening communicated with the containing cavity;

The cover plate is connected to the shell, seals the opening and is provided with a pole;

The battery cell is electrically connected to the pole; the battery unit is provided with an elastic pad in a compressing mode on at least one side face of the battery unit, the battery unit and the elastic pad are assembled into a component, and the component is arranged in the accommodating cavity after being bound by the first binding belt.

2. The battery module according to claim 1, wherein the battery module includes a plurality of the battery cells arranged in a stacked manner, and one of the elastic pads is provided between at least a pair of adjacent two of the battery cells in a thickness direction of any one of the battery cells.

3. The battery assembly of claim 2, further comprising an electrical connection plate disposed between the battery cells and the cover plate, the electrical connection plate comprising an insulating portion and a plurality of conductive portions, the insulating portion being provided with a plurality of through slots at intervals, each of the conductive portions being provided in each of the through slots and connected to the insulating portion, the conductive portions being electrically connected to the post, each of the battery cells being connected between two of the conductive portions, respectively.

4. The battery assembly of claim 2, further comprising two first end plates, wherein the first end plates are made of a non-metal material, the two first end plates are respectively disposed on opposite sides of the assembly in a thickness direction of the battery cell, and the assembly and the first end plates are integrally bound by the first binding band.

5. The battery assembly of claim 4, further comprising an electrical connection plate disposed between the battery cells and the cover plate, the electrical connection plate being electrically connected to the post, and all of the battery cells being electrically connected to one of the electrical connection plates;

Along the thickness direction of the battery monomer, two opposite sides of the electric connection plate are respectively connected with the two first end plates in a mortise and tenon mode.

6. The battery pack of claim 5, wherein the side edge of the electrical connection plate is provided with a first clamping protrusion, the side edge of the first end plate is provided with a first clamping groove, the first clamping protrusion is clamped in the first clamping groove, and/or the side edge of the electrical connection plate is provided with a second clamping groove, the side edge of the first end plate is provided with a second clamping protrusion, and the second clamping protrusion is clamped in the second clamping groove.

7. The battery assembly of claim 5, wherein opposite sides of the electrical connection plate are bonded to the two first end plates, respectively.

8. The battery assembly according to any one of claims 2 to 7, wherein the battery cell includes a battery body and a positive electrode tab and a negative electrode tab disposed at an interval to the battery body, the battery assembly includes a positive electrode tab and a negative electrode tab, the positive electrode tab is electrically connected to the positive electrode tab, and the negative electrode tab is electrically connected to the negative electrode tab;

The battery assembly further comprises an insulating piece, and the insulating piece is arranged between the adjacent pair of lugs.

9. The battery assembly of any one of claims 1-7, wherein the battery cells are bonded to adjacent ones of the resilient pads; and/or the number of the groups of groups,

The first strapping is made of nonmetal materials.

10. The battery pack according to any one of claims 1 to 7, wherein the opening is formed in a side surface of the case, the battery pack comprising one of the cover plates;

a first buffer layer is arranged between the bottom surface and the side wall of the accommodating cavity; and/or a second buffer layer is arranged between one side of the battery monomer, which is away from the cover plate, and the shell; and/or, the shell is also connected with a limiting structure, the limiting structure is positioned in the accommodating cavity, and the limiting structure can limit the relative position of one side, close to the cover plate, of the battery cell and the shell.

11. A battery module, comprising at least one battery pack, wherein the battery pack comprises a plurality of battery assemblies according to any one of claims 1-10, at least two second end plates and a second strapping, the plurality of battery assemblies are sequentially arranged to form a battery assembly body, the second end plates are at least arranged on opposite sides of the battery assembly body, and the battery assembly body and the periphery of the second end plates are strapping by the second strapping.