CN220042194U - Battery module, energy storage device and electric equipment - Google Patents

Abstract

The utility model discloses a battery module, an energy storage device and electric equipment, and relates to the technical field of batteries. The battery module includes: the collecting device comprises a collecting wire harness and two bracket bodies; the two bracket bodies enclose a containing cavity, at least one bracket body is provided with a plurality of through holes, and the acquisition wire harness is fixed on the bracket body with the through holes; the battery pack comprises a single battery and a busbar, wherein the busbar is provided with a concave part and two connecting parts; the busbar is located the support body that has the through-hole and is kept away from the one side of holding the chamber, and the depressed part is towards holding the chamber, and single battery's tip exposes in a through-hole department, and is connected with a connecting portion electricity. In the embodiment of the utility model, the concave part is arranged on the busbar so as to reduce the wiring terminal of the acquisition wire harness and increase the overall size of the battery module in the height direction of the single battery, thereby being convenient for realizing the miniaturization of the battery module; meanwhile, the fixing position of the wiring terminal is convenient to determine, and the fixing efficiency is improved.

Description

Battery module, energy storage device and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module, an energy storage device and electric equipment.

Background

The lithium ion battery is used as a clean and efficient novel energy source and is widely applied to various industries such as automobiles, ships, forklifts, energy storage and the like; in order to meet the use requirements of different working conditions, a plurality of single batteries are generally required to be formed into battery modules, and then the battery modules are matched with various electrical elements to form and package the battery modules in a sealed box body to form an energy storage device for customers to use.

The collection device in the current lithium battery module, the collection pencil that it includes is connected in the upper surface of busbar, leads to the high increase of lithium battery module to be unfavorable for lithium battery module's miniaturization.

Disclosure of Invention

The utility model provides a battery module, an energy storage device and electric equipment, which are convenient for realizing miniaturization of the battery module and improving assembly efficiency.

In order to achieve the purposes of the application, the utility model adopts the following technical scheme:

according to an aspect of the present utility model, there is provided a battery module including:

the collecting device comprises a collecting wire harness and two opposite bracket bodies, a containing cavity is formed between the two bracket bodies in a surrounding mode, at least one of the two bracket bodies is provided with a plurality of through holes, the collecting wire harness comprises a wiring terminal, and the collecting wire harness is fixed on the end face, far away from the containing cavity, of the bracket body with the through holes;

the battery pack comprises a plurality of single batteries and a plurality of bus bars, wherein each bus bar is provided with a concave part and connecting parts positioned at two sides of the concave part;

the plurality of single batteries are located in the accommodating cavity, the plurality of bus bars are located on one side, away from the accommodating cavity, of the support body with the through holes, the notch of the concave portion faces away from the accommodating cavity, the wiring terminals of the collecting wiring harness are fixedly connected with the concave portions of the bus bars, and the end portions of the single batteries are exposed at the hole openings of one through hole and are fixedly and electrically connected with one connecting portion of one bus bar.

In the embodiment of the utility model, the concave part is arranged on the busbar so as to reduce the wiring terminal of the acquisition wire harness and increase the overall size of the battery module in the height direction of the single battery, thereby being convenient for realizing the miniaturization of the battery module; meanwhile, the fixing position of the wiring terminal is convenient to determine, the fixing efficiency of the wiring terminal and the bus bar is convenient to improve, and the assembly efficiency of the battery module is further improved.

According to an embodiment of the present utility model, at the hole of the through hole, the end face of the single battery protrudes from the end face of the bracket body away from the accommodating cavity, and a gap exists between the surface of the concave portion facing the accommodating cavity and the end face of the bracket body away from the accommodating cavity.

Thus, the concave part of the bus bar can be prevented from interfering with the contact between the connecting part of the bus bar and the end face of the single battery, and the electric connection between the connecting part of the bus bar and the end part of the single battery can be ensured. In addition, because there is the clearance between the surface that holds the chamber towards the depressed part of busbar and the terminal surface that holds the chamber is kept away from to the support body to can avoid the heat conduction between depressed part and the support body of busbar, and then can avoid influencing the radiating problem of battery cell because of support body high temperature.

According to an embodiment of the utility model, at the hole of the through hole, the end face of the single battery is flush with the end face of the bracket body away from the accommodating cavity;

the support body is far away from the terminal surface of holding the chamber has a plurality of grooves of dodging with a plurality of busbar one-to-one, every the depressed part of busbar is located corresponding dodge the inslot, and every the depressed part orientation of busbar hold the surface in chamber with corresponding dodge and exist the clearance between the tank bottom in groove.

Therefore, the connection part of the busbar and the end face of the single battery can be ensured while the miniaturization of the battery module is realized; in addition, as a gap exists between the surface of the concave part of each busbar facing the accommodating cavity and the bottom of the corresponding avoidance groove, heat conduction between the concave part of each busbar and the bracket body can be avoided.

According to an embodiment of the utility model, a surface of the recess away from the accommodating cavity is flush with an end surface of the bracket body away from the accommodating cavity.

So, gather the pencil and can directly fix the terminal surface that holds the chamber in the support body far away to on the terminal surface that holds the chamber is walked the line to the depressed part of busbar in the support body, avoided because of the support body far away from the terminal surface that holds the chamber and the surface that holds the chamber was kept away from to the depressed part exist the height fall and cause the bellied condition of collection pencil after bending.

According to one embodiment of the utility model, the surface of the concave part away from the accommodating cavity is concave to the end face of the bracket body away from the accommodating cavity, the end face of the bracket body away from the accommodating cavity is provided with a wire groove extending to the avoidance groove, and the acquisition wire harness is positioned in the wire groove.

Therefore, through the arrangement of the wire slots, the influence of the collection wire harness on the overall size of the battery module in the height direction of the single battery can be further avoided, and the miniaturization of the battery module is effectively realized; and through the setting of wire casing, be convenient for gather the pencil and keep away from the fixed of the terminal surface that holds the chamber at the support body, when improving battery module's aesthetic property, improved the fixed efficiency of gathering the pencil on the support body.

According to an embodiment of the present utility model, the recess is in a wave-like structure.

In the embodiment of the utility model, the concave part of the wavy structure can buffer the pulling force of the two single batteries acting on the busbar after expanding more effectively.

According to one embodiment of the utility model, the end surface of the bracket body, which is far away from the accommodating cavity, is provided with a plurality of positioning structures corresponding to the plurality of bus bars one by one, the bus bars are provided with limiting structures, and the limiting structures are matched with the corresponding positioning structures to limit the bus bars.

In the embodiment of the utility model, the positioning of the plurality of buses can be realized through the matching of the plurality of positioning structures arranged on the end surface of the bracket body, which is far away from the accommodating cavity, and the limiting structures on the plurality of buses, so that the situation that the buses are shifted when the buses are fixed is avoided. Therefore, the assembly efficiency of the bracket is improved, and the yield of the bracket is also ensured.

According to an embodiment of the utility model, the positioning structure comprises a plurality of positioning columns, the limiting structure comprises a plurality of positioning holes corresponding to the positioning columns one by one, and each positioning hole is sleeved on the corresponding positioning column.

In the embodiment of the utility model, for one busbar, the positioning operation of the busbar is simplified and the positioning efficiency of the busbar is conveniently improved by sleeving the busbar on the plurality of positioning posts of the end surface of the bracket body, which is far away from the accommodating cavity, on the basis of the plurality of positioning holes on the busbar.

According to one embodiment of the utility model, the end face of the support body, which is far away from the accommodating cavity, is provided with a surrounding baffle extending along the height direction of the single battery, and the annular end face of the surrounding baffle is at least flush with the surface of the connecting part of the busbar, which is far away from the accommodating cavity.

According to the embodiment of the utility model, through the arrangement of the enclosure, the connection part of the bus bar and the battery cell and the connection part of the bus bar and the wiring terminal are prevented from being knocked in the carrying process of the battery module, so that the bus bar is loosened or even falls off, and the like, and the connection of the bus bar and the battery cell and the connection of the bus bar and the wiring terminal are protected, thereby ensuring the stability of charging and discharging of the battery module and the effectiveness of monitoring the working parameters of each battery cell.

According to an embodiment of the present utility model, the end portion of the unit cell has a post and an explosion-proof valve, each of which is exposed at an orifice of one of the through holes.

In the embodiment of the utility model, the explosion-proof valve of the single battery can be exposed at the orifice of one through hole of the bracket body, so that the avoidance opening for exposing the explosion-proof valve is prevented from being independently arranged on the bracket body while the safety of the battery module is ensured, the structure of the bracket body is simplified, and the structural strength of the bracket body is improved.

According to an aspect of the present utility model, there is provided an energy storage device including the battery module set forth in the above aspect. In combination with the above, in the embodiment of the utility model, the high density of the energy storage device can be realized, the endurance time of the energy storage device is increased, and the potential safety hazard of the energy storage device is reduced.

According to an aspect of the present utility model, there is provided an electric device, which includes the energy storage device according to the above aspect, and the energy storage device supplies power to the electric device. By combining the above, the electric equipment provided by the utility model has higher working stability, and ensures the use safety of the electric equipment.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The above and other features and advantages of the present utility model will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view illustrating a shaft-side structure of a battery module according to an exemplary embodiment.

Fig. 2 is a schematic diagram of an axial structure of a collection device after assembling a bus bar according to an exemplary embodiment.

Fig. 3 is a schematic top view of a rack body after assembling a single battery according to an exemplary embodiment.

Fig. 4 is a schematic top view of a battery module according to an exemplary embodiment.

Fig. 5 is a schematic side view of a bus bar according to an example embodiment.

Fig. 6 is a schematic side view of another busbar configuration according to an example embodiment.

Fig. 7 is a schematic cross-sectional view of the region a along X-X in fig. 4.

Fig. 8 is a schematic top view of another battery module according to an exemplary embodiment.

Fig. 9 is a schematic sectional view of the region B of fig. 8 along Y-Y.

Wherein reference numerals are as follows:

100. a battery module;

10. a collection device; 20. a battery pack;

101. a bracket body; 102. collecting a wire harness;

111. a receiving chamber; 112. a through hole; 113. an end face; 114. an avoidance groove; 115. positioning columns; 116. a surrounding baffle; 117. a connecting column; 118. a wire slot; 119. a groove bottom;

121. a connection terminal; 122. a temperature acquisition line; 123. a voltage acquisition line;

201. a single battery; 202. a busbar;

211. a pole; 212. an explosion-proof valve;

221. a recessed portion; 222. a connection part; 223. and positioning holes.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

Fig. 1 illustrates a schematic structure of a battery module 100 according to an embodiment of the present utility model. As shown in fig. 1, the battery module 100 includes: the collection device 10 and the battery pack 20, the collection device 10 includes a collection wire harness 102 and two opposite support bodies 101, and the battery pack 20 includes a plurality of single batteries 201 and a plurality of bus bars 202.

As shown in fig. 1, 2 and 3, a receiving cavity 111 is enclosed between the two bracket bodies 101, at least one of the two bracket bodies 101 has a plurality of through holes 112, a plurality of unit cells 201 are located in the receiving cavity 111, and an end of each unit cell 201 is exposed at an orifice of one through hole 112; the plurality of bus bars 202 are located on one side of the bracket body 101 with the through holes 112 far away from the accommodating cavity 111, each bus bar 202 is provided with a concave part 221 and connecting parts 222 located on two sides of the concave part 221, a notch of the concave part 221 faces away from the accommodating cavity 111, after the end part of each single battery 201 is exposed at the orifice of the through hole 112, the end part is fixed and electrically connected with one connecting part 222 of one bus bar 202, the acquisition wire harness 102 comprises a connecting terminal 121, the acquisition wire harness 102 is fixed on the end face 113 of the bracket body 101 with the through holes 112 far away from the accommodating cavity 111, and the connecting terminal 121 is fixedly connected with the concave part 221 of the bus bar 202.

In the embodiment of the utility model, the concave part 221 is arranged on the busbar 202, and the wiring terminal 121 of the acquisition wire harness 102 is connected with the concave part 221 of the busbar 202, so that the condition that the overall size of the battery module 100 in the height direction of the single battery 201 is increased by the wiring terminal 121 is reduced, and the miniaturization of the battery module 100 is facilitated; meanwhile, the fixing position of the connecting terminal 121 is convenient to determine, the fixing efficiency of the connecting terminal 121 and the bus bar 202 is convenient to improve, and the assembly efficiency of the battery module 100 is convenient to improve.

When the collection device 10 realizes the fixation of a plurality of single batteries 201, as shown in fig. 2, the collection device 10 further includes a plurality of connection posts 117 fixedly connected with two opposite support bodies 101, so that the two opposite support bodies 101 can be tensioned by the plurality of connection posts 117, the fixation of the two support bodies 101 can be realized, and the fixation of a plurality of single batteries 201 in the accommodating cavity 111 can be further realized.

Wherein, two support bodies 101 that set up relatively can enclose into a plurality of subchambers, hold the chamber 111 promptly and include a plurality of subchambers, and every subchamber all can hold a battery cell 201 to realize the holding of a plurality of battery cells 201, guarantee the mutual independence between a plurality of battery cells 201 simultaneously, in order to improve the security of battery module 100.

In the embodiment of the present utility model, in the case where at least one of the two holder bodies 101 has the through hole 112, it may be that one holder body 101 has the through hole 112, in this case, the cell 201 is taken as an example, two electrode terminals at the end portions of the cell 201 leak out at the apertures of different through holes 112, or in this case, the cell 201 is taken as an example, one end portion of the cell 201 leaks out at the aperture of one through hole 112, and the other end portion of the cell 201 is electrically connected to other cells 201 through the conductive member provided in the accommodating chamber 111. Of course, the two bracket bodies 101 may each have a through hole 112, and in this case, taking the single battery 201 as a cylindrical battery as an example, two ends of the single battery 201 may leak out of the openings of the through holes 112 in the two bracket bodies 101.

When one of the two bracket bodies 101 has a through hole 112, the bracket body 101 having the through hole 112 is provided with an acquisition wire harness 102 at an end face 113 away from the accommodating cavity 111, and a bus bar 202 fixed to and electrically connected with an end of the single battery 201; when both of the two bracket bodies 101 have the through holes 112, the end faces 113 of the two bracket bodies 101, which are away from the accommodation chamber 111, are each provided with the collection wire harness 102, and the bus bar 202 fixed to and electrically connected with the end portions of the unit cells 201.

In the case where one bracket body 101 has a through hole 112 or both bracket bodies 101 have through holes 112, the fixation of the collection harness 102 and the bus bar 202 is the same or similar. Therefore, in the following, one stent body 101 having a through hole 112 of the two stent bodies 101 will be explained in detail as an example.

In some embodiments, the collection wire harness 102 may be fixed on the end face 113 of the bracket body 101 away from the accommodating cavity 111 in advance, so as to realize the bracket body 101 and the collection wire harness 102, so that when the battery module 100 is assembled subsequently, only a plurality of single batteries 201 need to be installed in the accommodating cavity 111 enclosed by the two bracket bodies 101, the exposed part of the single batteries 201 at the orifice of the through hole 112 is fixed and electrically connected with the connecting part 222 of the busbar 202, and then the connection terminal 121 of the collection wire harness 102 is fixedly connected with the concave part 221 of the busbar 202, so as to improve the assembly efficiency of the battery module 100.

The collection wire harness 102 may be fixed on the end face 113 of the bracket body 101 far from the accommodating cavity 111 by a fixing member such as a wire clip, and the connection terminal 121 of the collection wire harness 102 may be fixed on the recess 221 of the busbar 202 by welding or the like.

Since the collection harness 102 can be used to collect the temperature of each cell 201 included in the battery pack 20, it can also be used for the voltage of each cell 201. Illustratively, as shown in fig. 4, the acquisition harness 102 includes a temperature acquisition line 122 for acquiring temperature and a voltage acquisition line 123 for acquiring voltage.

The connection terminal 121 of the temperature collection wire 122 may be directly fixed to the recess 221 of the busbar 202, for example, by welding, fastening by a bolt or a screw, etc., so long as heat conduction between the recess 221 of the busbar 202 and the connection terminal 121 of the temperature collection wire 122 is ensured. The connection terminal 121 of the voltage collection line 123 needs to be fixed and electrically connected with the recess 221 of the busbar 202, so that conduction between the connection terminal of the voltage collection line 123 and the recess 221 is facilitated, and thus the collection of the voltage of each single battery 201 is facilitated.

When the temperatures and voltages of the plurality of unit batteries 201 are collected, the connection terminals 121 of the plurality of temperature collection wires 122 may be respectively and fixedly connected with the concave portion 221 of each busbar 202, and the connection terminals 121 of the plurality of voltage collection wires 123 may be respectively and fixedly and electrically connected with the concave portion 221 of a part of the busbar 202.

In other embodiments, besides fixing the collection wire harness 102 on the end face 113 of the bracket body 101 away from the accommodating cavity 111 in advance, the busbar 202 may be limited on the end face 113 of the bracket body 101 away from the accommodating cavity 111 in advance, so as to further integrate the bracket body 101, the collection wire harness 102 and the busbar 202, and at this time, the connection terminal 121 of the collection wire harness 102 is fixedly connected with the recess 221 of the busbar 202 in advance. In this way, when the battery module 100 is assembled subsequently, only a plurality of single batteries 201 need to be installed in the accommodating cavity 111 enclosed by the two bracket bodies 101, and serial-parallel connection of the plurality of single batteries 201 can be realized through the bus bars 202 which are limited on the bracket bodies 101 in advance, so that the assembly efficiency of the battery module 100 is improved.

Optionally, the end surface 113 of the bracket body 101 away from the accommodating cavity 111 has a plurality of positioning structures corresponding to the plurality of bus bars 202 one by one, the bus bars 202 have a limiting structure, and the limiting structure cooperates with the corresponding positioning structure to limit the bus bars 202. Thus, when the plurality of bus bars 202 are fixed, the plurality of positioning structures are matched with the limiting structures on the plurality of bus bars 202, so that the plurality of bus bars 202 can be positioned in advance, and the situation that the bus bars 202 are shifted when the bus bars 202 are fixed is avoided. Thus, not only the assembly efficiency of the collecting device 10 is improved, but also the yield of the collecting device 10 is ensured.

Taking one busbar 202 as an example, as shown in fig. 4, the positioning structure includes a plurality of positioning posts 115, and the limiting structure includes a plurality of positioning holes 223 corresponding to the positioning posts 115 one by one, where each positioning hole 223 is sleeved on the corresponding positioning post 115. In this way, when the bus bar 202 is positioned on the bracket body 101, the bus bar 202 is only required to be sleeved on the positioning column 115 on the bracket body 101 based on the positioning holes 223 on the bus bar 202, so that the positioning operation of the bus bar 202 is simplified, and the positioning efficiency of the bus bar 202 is convenient to improve.

The positioning structure may include two, three, etc. positioning posts 115, as long as the positioning of the bus bar 202 can be achieved, and displacement of the bus bar 202 is avoided. Illustratively, as shown in fig. 4, the positioning structure includes two positioning posts 115, and the limiting structure includes two corresponding positioning holes 223, and each busbar 202 is sleeved on two corresponding positioning holes on the bracket body 101 based on the two positioning holes 223.

In order to ensure that the connection portion 222 of the busbar 202 can be fixed to and electrically connected with the end portion of the single battery 201 after the subsequent single battery 201 is assembled in the accommodating cavity 111 when the busbar 202 is pre-limited on the bracket body 101, the busbar 202 limited on the bracket body 101 can move along the height direction of the single battery 201, and can move in the direction close to the accommodating cavity 111 or in the direction far away from the accommodating cavity 111. At this time, after the bus bar 202 is sleeved on the positioning post 115 based on the positioning hole 223, only the end of the positioning post 115 is subjected to the operation such as hot melting, so as to avoid the situation that the bus bar 202 is separated from the positioning post 115. Of course, the slidable limitation of the bus bar 202 on the positioning post 115 may be implemented by other manners, which is not limited by the embodiment of the present utility model.

In some embodiments, as shown in fig. 2, the end face 113 of the rack body 101 remote from the accommodating chamber 111 has a fence 116 extending in the height direction of the unit cell 201 (i.e., in the direction remote from the accommodating chamber 111), and the annular end face of the fence 116 is at least flush with the surface of the connecting portion 222 of the busbar 202 remote from the accommodating chamber 111.

So, through enclosing the setting of keeping off 116, avoid taking place to collide with in the handling of battery module 100, the junction of busbar 202, busbar 202 and binding post 121, cause the not hard up of busbar 202 even drop etc. and cause the busbar 202 to take place not hard up with the binding post 121 between be connected, even the binding post 121 drops etc. circumstances, and then can realize the connection to the tip of busbar 202 and battery cell 201, and the protection to the connection of busbar 202 and binding post 121, reduce the potential safety hazard, and to the consumer that uses this energy memory, can improve the security of using.

The extending height of the enclosure 116 in the height direction of the single battery 201 may be specifically determined in conjunction with the connection terminal 121 of the collection wire harness 102, for example, when the connection terminal 121 protrudes out of the connection portion 222 of the busbar 202 and is away from the surface of the accommodating cavity 111, the annular end surface of the enclosure 116 may be flush with the connection terminal 121 of the collection wire harness 102; when the connecting terminal 121 is recessed in the surface of the connecting portion 222 of the busbar 202 away from the accommodating cavity 111, the annular end surface of the enclosure 116 may be flush with the surface of the connecting portion 222 of the busbar 202 away from the accommodating cavity 111.

In the embodiment of the present utility model, the recess 221 of the busbar 202 may be a recess 221 formed by partially recessing the surface of the busbar 202 away from the accommodating chamber 111 in a direction toward the accommodating chamber 111; as shown in fig. 5 or 6, the whole of the bus bar 202 in the thickness direction may be recessed toward the accommodating chamber 111 to form a recess 221.

In the case that the whole of the bus bar 202 in the thickness direction is recessed toward the accommodating cavity 111, when at least one of the unit batteries 201 connected by the two connection portions 222 of the bus bar 202 is expanded, the acting force applied to the bus bar 202 when the two unit batteries 201 are pulled mutually can be buffered, so that the situation that the bus bar 202 is broken and the connection between the bus bar 202 and the unit batteries 201 is loose is avoided, and the service life of the battery module 100 is prolonged.

The recessed portion 221 of the busbar 202 may have a flat plate-like structure as shown in fig. 5, or may have a wavy structure as shown in fig. 6. Compared with the concave portion 221 with a flat plate structure, the concave portion 221 with a wavy structure can more effectively buffer the acting force exerted on the bus bar 202 when the two unit batteries 201 are pulled mutually.

In some embodiments, the end of the unit cell 201 has a post 211 (positive or negative), where the post 211 of the unit cell 201 is exposed at the aperture of one through-hole 112 as shown in fig. 3, so that the connection portion 222 of the bus bar 202 can be fixed and electrically connected (e.g., welded) with the post 211 of the unit cell 201 at the aperture of the through-hole 112.

Further, the end of the battery cell 201 further has an explosion-proof valve 212, and after the battery cell 201 is assembled in the accommodating cavity 111, in order to avoid the bracket body 101 from shielding the explosion-proof valve 212 and preventing the explosion of the explosion-proof valve 212, as shown in fig. 3, the explosion-proof valve 212 of the battery cell 201 may be exposed at the orifice of one through hole 112 of the bracket body 101. Thus, the safety of the battery module 100 can be ensured.

For one single battery 201, the post 211 and the explosion-proof valve 212 of the single battery 201 may be exposed at the orifice of the same through hole 112, so that the avoidance opening for exposing the explosion-proof valve 212 is prevented from being separately arranged on the bracket body 101, thereby simplifying the structure of the bracket body 101 and improving the structural strength of the bracket body 101.

In the embodiment of the present utility model, when the unit cell 201 is mounted in the accommodating cavity 111 of the bracket body 101, at the orifice of the through hole 112, the end surface of the unit cell 201 (i.e., the end surface of the pole 211) may protrude from the end surface 113 of the bracket body 101 away from the accommodating cavity 111, or may be flush with the end surface 113 of the bracket body 101 away from the accommodating cavity 111, or may be concave from the end surface 113 of the bracket body 101 away from the accommodating cavity 111, as long as the fixing of the unit cell 201 in the accommodating cavity 111 can be achieved, and the fixing and the electrical connection between the connection portion 222 of the busbar 202 and the unit cell 201 are ensured, which is not limited in the embodiment of the present utility model.

When the end surface of the unit cell 201 protrudes from the end surface 113 of the holder body 101 away from the accommodation chamber 111, as shown in fig. 4 and 7, the protruding height H1 of the end surface of the unit cell 201 is greater than the recessed depth H2 of the recess 221 to ensure that a gap exists between the surface of the recess 221 facing the accommodation chamber 111 and the end surface 113 of the holder body 101 away from the accommodation chamber 111. In this way, the recess 221 of the bus bar 202 can be prevented from interfering with the contact of the connection portion 222 of the bus bar 202 with the end surface of the unit cell 201, so that the fixed connection of the connection portion 222 of the bus bar 202 with the end surface of the unit cell 201 can be ensured. In addition, since the recessed portion 221 of the busbar 202 is not in contact with the holder body 101, heat conduction between the recessed portion 221 of the busbar 202 and the holder body 101 can be avoided, and the problem that heat dissipation of the battery cell 201 is affected by an excessive temperature of the holder body 101 can be avoided.

Illustratively, the protruding height H1 of the end of the unit cell 201 is greater than or equal to 10 mm and less than or equal to 11 mm, and the recessed depth H2 of the recess 221 is greater than or equal to 4 mm and less than or equal to 5 mm. In this way, a gap of at least 5 mm is ensured between the surface of the recess 221 of the busbar 202 facing the accommodating chamber 111 and the end face 113 of the bracket body 101 facing away from the accommodating chamber 111, so as to avoid heat conduction between the recess 221 of the busbar 202 and the bracket body 101.

When the end surface of the unit battery 201 is flush with the end surface 113 of the holder body 101 away from the accommodating cavity 111, as shown in fig. 8 and 9, the end surface 113 of the holder body 101 away from the accommodating cavity 111 has a plurality of avoidance grooves 114 corresponding to the plurality of bus bars 202 one by one, the recess 221 of each bus bar 202 is located in the corresponding avoidance groove 114, and a gap exists between the surface of the recess 221 of each bus bar 202 facing the accommodating cavity 111 and the groove bottom 119 of the corresponding avoidance groove 114.

In this way, by setting the avoidance groove 114, and because there is a gap between the surface of the concave portion 221 facing the accommodating cavity 111 and the groove bottom 119 of the corresponding avoidance groove 114, that is, the concave depth H2 of the concave portion 221 of the busbar 202 is smaller than the groove depth H3 of the corresponding avoidance groove 114, connection between the connection portion 222 of the busbar 202 and the end surface of the single battery 201 can be ensured while miniaturization of the battery module 100 is achieved. In addition, since the recess 221 of each busbar 202 is in a non-contact state with the corresponding escape groove 114, heat conduction between the recess 221 of the busbar 202 and the bracket body 101 is avoided.

In order to avoid the contact between the portion of the connection portion 222 of the busbar 202 near the recess 221 and the bracket body 101, the avoidance groove 114 extends to the opening of the through hole 112 corresponding to the two unit cells 201 to which the two connection portions 222 of the busbar 202 are connected.

While in the case where the recess 221 is located in the escape groove 114, when connection of the connection terminal 121 of the collection wire harness 102 with the recess 221 is achieved, in some embodiments, a surface of the recess 221 remote from the accommodation chamber 111 is flush with the end face 113 of the holder body 101 remote from the accommodation chamber 111. Thus, the collection wire harness 102 can be directly fixed on the end face 113 of the support body 101 far away from the accommodating cavity 111, and the end face 113 of the support body 101 far away from the accommodating cavity 111 is routed to the concave part 221 of the busbar 202, so that the situation that the collection wire harness 102 is bent and then bulges due to the height difference between the end face 113 of the support body 101 far away from the accommodating cavity 111 and the surface of the concave part 221 far away from the accommodating cavity 111 is avoided, and further the situation that the collection wire harness 102 is in a bending state for a long time, so that the creep failure of the collection wire harness 102 is caused, and the long-term use effectiveness of the collection wire harness 102 is ensured.

In addition, in combination with the above-mentioned condition that the end face 113 of the bracket body 101 far away from the accommodating cavity 111 has the enclosure 116, the problem that the collection wire harness 102 is easily worn at the protrusion due to the fact that the protruding portion exceeds the annular end face of the enclosure 116 after the collection wire harness 102 is bent and protruded due to the height drop can be avoided, and the problem that assembly interference exists among the plurality of battery modules 100 is avoided.

In other embodiments, as shown in fig. 8, the surface of the recess 221 away from the accommodating cavity 111 is recessed from the end surface 113 of the holder body 101 away from the accommodating cavity 111, and the end surface 113 of the holder body 101 away from the accommodating cavity 111 has a wire groove 118 extending to the escape groove 114, and the collection wire harness 102 is located in the wire groove 118. In this way, by the arrangement of the wire slots 118, the influence of the collection wire harness 102 on the overall size of the battery module 100 in the height direction of the single battery 201 can be further avoided, so that the miniaturization of the battery module 100 is effectively realized; and through the setting of wire casing 118, be convenient for gather the fixed of terminal surface 113 that the pencil 102 kept away from holding chamber 111 at support body 101, when improving the aesthetic property of battery module 100, improved the fixed efficiency of gathering pencil 102 on support body 101.

The embodiment of the utility model also provides an energy storage device, which comprises at least one battery module 100 according to the embodiment. The energy storage device may be a battery pack, a battery cluster, or the like, which is composed of the above-described battery module 100. By combining the above, the energy storage device can realize high density, improve the endurance time of the energy storage device and prolong the service life of the energy storage device.

The embodiment of the utility model also provides electric equipment, which comprises the energy storage device in the embodiment, and the energy storage device supplies power for the electric equipment. The electrical equipment can be energy storage equipment, vehicles, energy storage containers and the like. By combining the above, the electric equipment provided by the utility model has higher working stability, and is convenient for reducing downtime probability.

In the examples of the application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the examples of application will be understood by those of ordinary skill in the art as the case may be.

In the description of the application embodiments, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the application embodiments and simplifying the description, and do not indicate or imply that the devices or units to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the application embodiments.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 an application embodiment. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the application embodiment, and is not intended to limit the application embodiment, and various modifications and changes may be made to the application embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the application should be included in the protection scope of the embodiments of the application.

Claims (12)

1. A battery module (100), characterized by comprising:

the collecting device (10) comprises a collecting wire harness (102) and two opposite support bodies (101), wherein a containing cavity (111) is formed between the two support bodies (101), at least one of the two support bodies (101) is provided with a plurality of through holes (112), the collecting wire harness (102) comprises a connecting terminal (121), and the collecting wire harness (102) is fixed on the end face (113) of the support body (101) with the through holes (112) far away from the containing cavity (111);

a battery pack (20) comprising a plurality of unit cells (201) and a plurality of bus bars (202), each of the bus bars (202) having a recess (221) and connection portions (222) located on both sides of the recess (221);

the plurality of single batteries (201) are located in the accommodating cavity (111), the plurality of bus bars (202) are located on one side, away from the accommodating cavity (111), of the support body (101) with the through holes (112), the notch of the concave part (221) faces away from the accommodating cavity (111), the wiring terminals (121) of the collecting wiring harness (102) are fixedly connected with the concave parts (221) of the bus bars (202), and the end parts of each single battery (201) are exposed at the hole of one through hole (112) and are fixedly and electrically connected with one connecting part (222) of one bus bar (202).

2. The battery module (100) according to claim 1, wherein at the aperture of the through-hole (112), the end face of the unit cell (201) protrudes from the end face (113) of the holder body (101) away from the accommodation chamber (111), and a gap exists between the surface of the recess (221) facing the accommodation chamber (111) and the end face (113) of the holder body (101) away from the accommodation chamber (111).

3. The battery module (100) according to claim 1, wherein, at the aperture of the through-hole (112), the end face of the unit cell (201) is flush with the end face (113) of the holder body (101) remote from the accommodation chamber (111);

the support body (101) is kept away from the terminal surface (113) of holding chamber (111) have with a plurality of dodge groove (114) of busbar (202) one-to-one, every depressed part (221) of busbar (202) are located the correspondence dodge inslot (114), and every depressed part (221) of busbar (202) are towards hold the surface of chamber (111) with the corresponding dodge and have the clearance between tank bottom (119) of groove (114).

4. A battery module (100) according to claim 3, wherein the surface of the recess (221) remote from the accommodation chamber (111) is flush with the end face (113) of the holder body (101) remote from the accommodation chamber (111).

5. A battery module (100) according to claim 3, wherein the surface of the recess (221) away from the accommodating cavity (111) is concave to the end face (113) of the holder body (101) away from the accommodating cavity (111), the end face (113) of the holder body (101) away from the accommodating cavity (111) has a wire groove (118) extending to the avoidance groove (114), and the collection wire harness (102) is located in the wire groove (118).

6. The battery module (100) according to any one of claims 1 to 5, wherein the recess (221) has a wavy structure.

7. The battery module (100) according to any one of claims 1 to 5, wherein an end surface (113) of the bracket body (101) away from the accommodating cavity (111) is provided with a plurality of positioning structures corresponding to the plurality of bus bars (202) one by one, the bus bars (202) are provided with limiting structures, and the limiting structures cooperate with the corresponding positioning structures to limit the bus bars (202).

8. The battery module (100) of claim 7, wherein the positioning structure comprises a plurality of positioning posts (115), the limiting structure comprises a plurality of positioning holes (223) corresponding to the positioning posts (115) one by one, and each positioning hole (223) is sleeved on the corresponding positioning post (115).

9. The battery module (100) according to any one of claims 1 to 5, wherein an end surface (113) of the holder body (101) remote from the accommodation chamber (111) has a fence (116) extending in a height direction of the unit cells (201), and an annular end surface of the fence (116) is at least flush with a surface of a connecting portion (222) of the busbar (202) remote from the accommodation chamber (111).

10. The battery module (100) according to any one of claims 1 to 5, wherein the end portion of the unit cell (201) has a post (211) and an explosion-proof valve (212), and both the post (211) and the explosion-proof valve (212) are exposed at the aperture of one of the through-holes (112).

11. An energy storage device, characterized by comprising a battery module (100) according to any one of claims 1-10.

12. A powered device comprising the energy storage device of claim 11, the energy storage device providing power to the powered device.