CN219843093U - Battery module and battery pack - Google Patents

Abstract

The utility model provides a battery module and a battery pack, wherein the battery module comprises: a battery holder; the battery unit is arranged on the upper side surface of the battery bracket; the CCS component is lapped on the upper side of the battery cells and is used for connecting two adjacent battery cells in series in the length direction of the battery support and connecting two adjacent battery cells in parallel in the width direction of the battery support; and the heat conduction structure adhesive is coated on the upper surface of the CCS component and used for guiding out heat of the battery module from the heat conduction structure adhesive side for heat dissipation. The heat-conducting structural adhesive can bond and fix all parts of the CCS assembly on one hand, is convenient for the integrated material feeding of the CCS assembly, and can lead out the heat in the battery module from the heat-conducting structural adhesive part on the other hand so as to dissipate the heat generated in the working process of the battery module from the heat-conducting structural adhesive part, thereby avoiding the step of assembling a coiled pipe between the battery monomers, effectively improving the density of the battery monomers in the battery module and being beneficial to improving the energy density of the battery module.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack.

Background

Most of the existing cylindrical battery modules are cooled by adopting a 'coil pipe', and the cooling structure makes the forming process of the battery modules complex and the assembly efficiency low, meanwhile, the 'coil pipe' is generally arranged between the battery cells, so that the density of the battery cells of the battery modules is reduced, and the energy density of the battery modules is further reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a battery module which has high assembly efficiency and high energy density.

Another object of the present utility model is to provide a battery pack that is easy to assemble and has high heat dissipation efficiency.

The embodiment of the utility model is realized by the following technical scheme:

a battery module, comprising: a battery holder; the battery unit is arranged on the upper side surface of the battery bracket; the CCS component is lapped on the upper side of the battery cell and is used for connecting two adjacent battery cells in series in the length direction of the battery bracket and connecting two adjacent battery cells in parallel in the width direction of the battery bracket; and the heat conduction structure adhesive is coated on the upper surface of the CCS component and used for leading out heat of the battery module from the heat conduction structure adhesive side for heat dissipation.

According to a preferred embodiment, the distance between two adjacent battery cells is not less than 2mm.

According to a preferred embodiment, the battery support is provided with pressure relief holes in a penetrating manner, the pressure relief holes are in one-to-one correspondence with the battery cells, and the explosion-proof valves of the battery cells can be exposed out of the lower surface of the battery support through the pressure relief holes corresponding to the battery cells; the lower surface of battery support is provided with the extension arch, the extension arch is followed and is kept away from the direction extension setting of battery support.

According to a preferred embodiment, a plurality of the extending protrusions are circumferentially and uniformly distributed around the pressure relief hole.

According to a preferred embodiment, the extending protrusion is provided with a buffer surface near the pressure relief hole, and the buffer surface is an arc surface opening toward the pressure relief hole.

According to a preferred embodiment, the buffer surface is provided with a reinforcing rib extending toward the pressure release hole side; the reinforcing bars are connected to the battery holder.

According to a preferred embodiment, a plurality of limiting protrusions are arranged on the periphery side of the pressure relief hole, limiting surfaces are arranged on the limiting protrusions towards the pressure relief hole, and the limiting surfaces are arc surfaces with openings towards the pressure relief hole; the limiting protrusion is positioned on the upper surface of the battery bracket.

According to a preferred embodiment, the CCS assembly comprises: a tray; the positive electrode busbar is arranged at one end of the tray; the negative electrode busbar is arranged at the other end of the tray and is opposite to the positive electrode busbar; the guide bars are arranged on the tray, a plurality of guide bars are sequentially connected in series along the positive electrode bus bars to the negative electrode bus bars, and the positive electrode bus bars and the negative electrode bus bars are respectively connected in series with the guide bars adjacent to the positive electrode bus bars and the negative electrode bus bars; and a flexible circuit board disposed on one side in the width direction of the tray; defining the end part of the tray, on which the positive electrode bus bar is assembled, as a positive electrode end, and the end part of the tray, on which the negative electrode bus bar is assembled, as a negative electrode end; the positive terminal and the negative terminal are both provided with mounting seats for assembling connectors to which the flexible circuit board is connected.

According to a preferred embodiment, the flexible circuit board is provided with a detection nickel piece for connecting to at least one of the positive electrode busbar, the negative electrode busbar and the deflector; the tray is provided with accommodating grooves on two sides in the width direction of the tray, and the accommodating grooves are used for accommodating the detection nickel sheets on the flexible circuit board.

According to a preferred embodiment, a plurality of the receiving grooves on one side in the tray width direction are defined as a first groove group, and a plurality of the receiving grooves on the other side in the tray width direction are defined as a second groove group; the first groove group and the second groove group are arranged on the tray in a central symmetry mode.

According to a preferred embodiment, the mounting at the positive end and the mounting at the negative end are arranged centrally and symmetrically on the tray.

A battery pack comprises an upper liquid cooling plate and the battery module; the upper liquid cooling plate is attached to the upper surface of the heat conduction structural adhesive.

According to a preferred embodiment, the battery pack further comprises a lower liquid cooling plate, and the battery holder is abutted to the lower liquid cooling plate.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

the battery bracket provides support for the battery monomer and is used for limiting and fixing the battery monomer in the longitudinal direction by matching with the CCS component; the heat conduction structure glue coated on the upper surface of the CCS component can bond and fix all parts of the CCS component, so that the CCS component is convenient to integrally feed, the assembly efficiency of the battery module is improved, on the other hand, the heat conduction structure glue can lead out the heat in the battery module from the heat conduction structure glue part, so that the heat generated in the working process of the battery module is dissipated from the heat conduction structure glue part, the step of assembling a coiled pipe between the battery monomers can be avoided, the density of the battery monomers in the battery module can be effectively improved, and the energy density of the battery module is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present utility model;

fig. 2 is a schematic view of a first perspective structure of a battery bracket according to an embodiment of the present utility model;

fig. 3 is a schematic view of a second perspective structure of a battery bracket according to an embodiment of the present utility model;

fig. 4 is a schematic bottom view of a battery bracket according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a CCS module according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of an exploded view of a CCS assembly according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a negative electrode module according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of an anode module according to an embodiment of the present utility model.

Icon: 100. a battery cell; 200. a CCS component; 210. a positive bus bar; 211. a guide row; 212. a negative electrode bus bar; 220. a connector; 230. a flexible circuit board; 231. a connection part; 232. an extension; 233. detecting a nickel sheet; 240. a tray; 241. a mounting base; 242. a receiving groove; 300. a heat conducting structural adhesive; 400. a battery holder; 410. a pressure relief hole; 420. a limit protrusion; 421. a limiting surface; 430. an extension protrusion; 431. a buffer surface; 432. reinforcing ribs; 440. and a pressure relief notch.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are referred to, the positional relationship is based on the positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like are described with reference to the angle shown in the drawings, and should not be construed as limiting the specific embodiments. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Referring to fig. 1 to 8, a battery module includes a battery bracket 400, a battery cell 100, a CCS assembly 200, and a heat conductive structural adhesive 300, wherein: the battery cell 100 is mounted to the upper side of the battery holder 400; the CCS assembly 200 is overlapped on the upper side of the battery cells 100, and is used for connecting two adjacent battery cells 100 in series in the length direction of the battery support 400, and connecting two adjacent battery cells 100 in parallel in the width direction of the battery support 400; and the heat-conducting structural adhesive 300 is coated on the upper surface of the CCS assembly 200, and is used for guiding out heat of the battery module from the side of the heat-conducting structural adhesive 300 for heat dissipation. As shown in fig. 1, the battery cell 100 is a cylindrical battery, and the battery bracket 400 provides support for the battery cell 100, and is used for limiting and fixing the battery cell 100 in the longitudinal direction in cooperation with the CCS assembly 200; the heat conduction structure glue 300 coated on the upper surface of the CCS assembly 200 can bond and fix all parts of the CCS assembly 200, so that the CCS assembly 200 is convenient to feed integrally, the assembly efficiency of the battery module is improved, and on the other hand, the heat conduction structure glue 300 can lead out heat in the battery module from the heat conduction structure glue 300 part so as to dissipate heat generated in the working process of the battery module from the heat conduction structure glue 300 part, thereby avoiding the step of assembling a coiled pipe between the battery monomers 100, effectively improving the density of the battery monomers 100 in the battery module and improving the energy density of the battery module. It should be noted that, air cooling can be selected according to the requirement or a cooling device, such as a liquid cooling plate, can be additionally arranged on the upper side surface of the heat conducting structural adhesive 300, so that the heat dissipation efficiency of the battery module can be further improved.

In this embodiment, the distance between two adjacent battery cells 100 is not less than 2mm. Alternatively, the distance between adjacent two battery cells 100 is 2.2mm, 2.4mm, or 2.6mm. Preferably, the distance between adjacent two battery cells 100 is 2mm. By the arrangement, short circuit between two adjacent battery monomers 100 can be avoided, and the battery density can be improved, so that the energy density of the battery module is improved.

As shown in fig. 2, 3 and 4, the battery bracket 400 is provided with pressure release holes 410 corresponding to the battery cells 100 in a penetrating manner, and the explosion-proof valve of the battery cell 100 can be exposed to the lower surface of the battery bracket 400 through the pressure release holes 410 corresponding to the battery cell 100; the lower surface of the battery holder 400 is provided with an extension protrusion 430, and the extension protrusion 430 is extended in a direction away from the battery holder 400. In this embodiment, the extension protrusion 430 is extended in a direction away from the battery bracket 400, that is, the extension protrusion 430 is extended downward, so that a pressure relief gap is formed between the bottom surface of the battery module assembled in the battery case and the bottom protection plate of the battery pack, and the pressure relief gap can be communicated to the explosion-proof valve of the battery cell 100 through the pressure relief hole 410. When the battery cell 100 is in thermal runaway, high-temperature and high-pressure gas in the battery cell 100 overflows through the explosion-proof valve and flows into the pressure relief gap through the pressure relief hole 410; meanwhile, after the extension protrusions 430 are in contact with the bottom guard plate, the battery cells 100 on the battery bracket 400 can be supported, which is helpful for improving the structural strength of the battery pack formed by assembling the battery module.

Further, as shown in fig. 3 and 4, a plurality of extension protrusions 430 are disposed around the pressure relief hole 410. Further, the plurality of extension protrusions 430 are circumferentially distributed around the pressure relief hole 410. In this embodiment, the gaps between two adjacent extending protrusions 430 form a pressure relief gap 440, as shown in fig. 4, six extending protrusions 430 are circumferentially and uniformly distributed around the pressure relief hole 410, and when a thermal runaway occurs in a battery cell 100 corresponding to a certain pressure relief hole 410, high-temperature and high-pressure gas enters the pressure relief gap through the pressure relief hole 410 and escapes and is relieved through the pressure relief gap 440. The pressure relief notch 440 can shunt the high-temperature and high-pressure gas entering the pressure relief gap when the battery cell 100 is in thermal runaway, and can block the high-temperature and high-pressure gas at the pressure relief hole 410 through the extension protrusion 430 surrounding the pressure relief hole 410 while not affecting the normal pressure relief, so that the diffusion speed of the high-temperature and high-pressure gas at the bottom of the battery bracket 400 is slowed down, the time for the part of thermal runaway gas to diffuse to other surrounding normal battery cells 100 is prolonged, the thermal runaway problem is treated for a sufficient time for users, and the large-area thermal runaway of the battery cell 100 in the battery module is avoided to a certain extent, and the safety of the battery module is ensured; meanwhile, the extension protrusions 430 circumferentially and uniformly distributed around the pressure relief notch 440 can uniformly split the high-temperature and high-pressure gas at the location, so that the amount of the high-temperature and high-pressure gas dissipated to the periphery of the thermal runaway battery cell 100 is uniform, rather than being intensively dissipated to a certain battery cell 100, thereby ensuring the safety of the surrounding battery cells 100.

In this embodiment, the pressure relief notches 440 are communicated to form a pressure relief channel.

It should be noted that, the pressure release holes 410 are disposed in one-to-one correspondence with the battery cells 100, so that the distance between two adjacent pressure release holes 410 is not less than 2mm.

As shown in fig. 4, the extension protrusion 430 is provided with a buffer surface 431 on the pressure release hole 410 side, and the buffer surface 431 is an arc surface opening toward the pressure release hole 410 side. The circular arc surface can reflect the high-temperature and high-pressure gas dissipated from the pressure relief hole 410 correspondingly, so as to buffer the high-temperature and high-pressure gas.

Further, the buffer surface 431 is provided with a reinforcing rib 432, and the reinforcing rib 432 extends toward the pressure release hole 410; the reinforcing bars 432 are connected to the battery holder 400. In this embodiment, the reinforcing ribs 432 can improve the structural strength of the extension protrusions 430 on the battery bracket 400 on one hand, and can cooperate with the buffer surface 431 to block the high-temperature and high-pressure gas at the corresponding pressure release holes 410 to realize buffering, so that the time for the high-temperature and high-pressure gas to diffuse to other normally operated battery cells 100 is delayed under the condition of not affecting pressure release, more processing time is striven for users, and the safety of the battery module is ensured.

As shown in fig. 2, a plurality of limit protrusions 420 are arranged on the peripheral side of the pressure relief hole 410, a limit surface 421 is arranged on the limit protrusion 420 towards the pressure relief hole 410, and the limit surface 421 is an arc surface with an opening towards the pressure relief hole 410; the stopper protrusion 420 is located at the upper surface of the battery holder 400. In this embodiment, six limiting protrusions 420 are circumferentially and uniformly distributed around the pressure relief hole 410. The limiting protrusion 420 serves to limit the battery cell 100 to increase structural stability of the battery cell 100 assembled to the battery holder 400. The limiting surface 421 has an arc surface structure, so that the limiting protrusion 420 can be in contact with the peripheral side surface of the battery cell 100, and the limiting fixing effect is better.

In this embodiment, as shown in fig. 1 and 6, CCS assembly 200 in this embodiment includes tray 240, positive bus bar 210, negative bus bar 212, current guiding bar 211 and flexible circuit board 230, wherein: the positive electrode bus bar 210 is disposed at one end of the tray 240; the negative electrode bus bar 212 is arranged at the other end of the tray 240, and the negative electrode bus bar 212 is arranged opposite to the positive electrode bus bar 210; the guide bars 211 are arranged on the tray 240, the guide bars 211 are sequentially connected in series along the positive electrode bus bar 210 to the negative electrode bus bar 212, and the positive electrode bus bar 210 and the negative electrode bus bar 212 are respectively connected in series with the adjacent guide bars 211; the flexible circuit board 230 is disposed at one side of the tray 240 in the width direction; defining the end of tray 240 on which positive bus bar 210 is mounted as the positive end and the end of tray 240 on which negative bus bar 212 is mounted as the negative end; the positive and negative terminals are each provided with a mounting seat 241 for mounting the connector 220, and the flexible circuit board 230 is connected to the connector 220. In this embodiment, through the structural design of integrating the positive bus bar 210, the negative bus bar 212 and the flow guide bar 211 on the tray 240, the integrated material feeding of the CCS assembly 200 can be realized, the time and steps for assembling the CCS assembly 200 and the battery cell 100 into a battery module can be reduced, and the assembly efficiency can be effectively improved. Optionally, the tray 240 is an injection molded plastic part. The tray 240 made of plastic is light in weight and high in strength, and can provide effective support for the positive bus bar 210, the guide bar 211 and the negative bus bar 212. In this embodiment, as shown in fig. 7 and 8, the CCS assembly 200 is configured to connect each battery cell 100 in series in the length direction of the battery module, and selectively collect a voltage signal or a temperature signal of the battery cell 100 in the direction, so as to monitor the temperature and the voltage signal of the battery cell 100 in the battery module, and manage the battery module in cooperation with the BMS.

Further, as shown in fig. 6, both the positive end and the negative end of the tray 240 are provided with mounting seats 241 for assembling the connectors 220, when in use, in the production scenes of different types of battery modules (positive electrode module and negative electrode module), users can selectively assemble the connectors 220 on the mounting seats 241 at the positive end and the mounting seats 241 at the negative end to adapt to the production requirements of the corresponding positive electrode module and negative electrode module, and the structural design of the tray 240 can effectively solve the problem that the CCS assembly 200 materials are not compatible when different battery modules are produced, so that the production cost of the battery modules is reduced, the difficulty of material management and control is reduced, and the production beat is improved. As shown in fig. 7 and 8, the negative electrode module and the positive electrode module, respectively.

Further, as shown in fig. 6, the mounting base 241 at the positive end and the mounting base 241 at the negative end are arranged on the tray 240 in a central symmetry manner. The tray 240 is in a cuboid shape on the whole, the positive electrode end and the negative electrode end are positioned at two end parts of the tray 240 in the length direction, and the two mounting seats 241 are arranged in a central symmetry mode, so that when the tray 240 is used, the tray 240 can be assembled by adapting to different types of battery modules by rotating 180 degrees along the central symmetry points of the two mounting seats 241. As shown in fig. 7, in this state, the battery module is a negative electrode module, which constitutes a positive electrode module as shown in fig. 8, by rotating the CCS assembly 200, i.e., the tray 240, 180 ° around the center symmetry point of the two mounting seats 241 on the battery cell 100 group. It should be noted that, after the adjustment of the tray 240, the assembly position of the flexible circuit board 230 on the tray 240 may be adjusted according to the need, so that the temperature and voltage signals of the battery cells 100 can be selectively detected in the length direction of the battery module, and the battery cells can be connected to the corresponding connectors 220.

Preferably, the mounting base 241 is integrally injection molded with the tray 240.

In this embodiment, as shown in fig. 1, 5 and 6, the positive electrode bus bar 210, the plurality of flow guide bars 211 and the negative electrode bus bar 212 are sequentially arranged in the length direction of the battery module, for connecting adjacent battery cells 100 in parallel in the width direction of the tray 240 and connecting adjacent battery cells 100 in series in the length direction of the tray 240. In this embodiment, a plurality of battery cells 100 forming a cylindrical power battery module are arranged in an array along the length direction of the tray 240, so as to form one battery cell of the cylindrical power battery module. The cylindrical power battery module in this embodiment includes four battery cells arranged in parallel. In order to improve the energy density, four parallel-arranged battery cells are stacked in the width direction of the tray 240, and the battery cells 100 of the four battery cells are arranged in a staggered manner in the length direction of the tray 240, so that more cylindrical battery cells 100 can be arranged in the same area.

In the present embodiment, the flexible circuit board 230 is provided with a detection nickel piece 233 for connecting to at least one of the positive electrode bus bar 210, the negative electrode bus bar 212, and the guide bar 211; the tray 240 is provided with receiving grooves 242 at both sides in the width direction thereof for receiving the detection nickel pieces 233 on the flexible circuit board 230. As shown in fig. 1, the flexible circuit board 230 is extended along the length direction of the tray 240 to one side of the tray 240, and the flexible circuit board 230 is provided with the same number of extension parts 232 as one unit cell 100 for mounting the detection nickel plate 233. In this embodiment, it is preferable that the positive bus bar 210, the negative bus bar 212 and the plurality of flow guide bars 211 are respectively and uniformly connected with the detection nickel plates 233, so as to realize the overall monitoring of temperature and voltage signals of the battery module assembled by the CCS assembly 200 provided by this embodiment. The end of the flexible circuit board 230 near the connector 220 is bent to form a connection portion 231 for connection to the connector 220. Specifically, the extending portion 232 and/or the detecting nickel piece 233 are embedded in the accommodating groove 242, and the detecting nickel piece 233 extends to the adjacent positive bus bar 210, negative bus bar 212 and guide bar 211. The receiving groove 242 may structurally protect the extension 232 and the detection nickel tab 233 while facilitating the assembly of the flexible circuit board 230 to the tray 240 to reduce the overall thickness of the CCS assembly 200.

Further, a plurality of receiving grooves 242 at one side in the width direction of the tray 240 are defined as a first groove group, and a plurality of receiving grooves 242 at the other side in the width direction of the tray 240 are defined as a second groove group; the first groove group and the second groove group are arranged centrally and symmetrically on the tray 240. The arrangement is the same as the mounting seat 241, so that the tray 240 can be adapted to different types of battery modules by rotating the tray by 180 ° along the central symmetry points of the first and second groove groups when in use.

The embodiment also provides a battery pack, which comprises an upper liquid cooling plate (not shown in the figure) and the battery module; the upper liquid cooling plate is attached to the upper surface of the heat conductive structural adhesive 300. The upper liquid cooling plate can effectively improve the heat dissipation efficiency of the battery module.

Further, the battery pack further includes a bottom guard plate (shown in the drawing) to which the battery holder 400 is abutted.

In some embodiments, the underside of the bottom shield may be provided with a lower liquid cooling plate (not shown); the bottom guard plate is adhered to the lower liquid cooling plate through heat conducting glue. So set up, the gaseous heat of high temperature high pressure in the pressure release clearance can be through heat-conducting glue quick transfer to lower liquid cooling board department, realizes the gaseous rapid cooling of high temperature in the pressure release clearance.

In other embodiments, a lower liquid cooling plate may be disposed between the bottom guard plate and the battery holder 400, or the lower liquid cooling plate may serve as the bottom guard plate, at which time the extension protrusions 430 abut against the surface of the lower liquid cooling plate, the upper surface of the lower liquid cooling plate and the lower surface of the battery holder 400 together defining a pressure relief gap. Under this structural state, when battery monomer 100 thermal runaway, after high temperature high pressure gas got into the pressure release clearance, direct contact was to lower liquid cooling board, can further improve the radiating efficiency of high temperature high pressure gas in the pressure release clearance to improve the radiating efficiency of battery module when thermal runaway, and then improve the security of battery package.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (13)

1. A battery module, comprising:

a battery holder (400);

a battery cell (100) mounted on the upper side of the battery holder (400);

the CCS component (200) is lapped on the upper side of the battery cell (100) and is used for connecting two adjacent battery cells (100) in series in the length direction of the battery bracket (400) and connecting two adjacent battery cells (100) in parallel in the width direction of the battery bracket (400); and

and the heat conduction structure adhesive (300) is coated on the upper surface of the CCS assembly (200) and is used for guiding out heat of the battery module from the side of the heat conduction structure adhesive (300) to dissipate heat.

2. The battery module according to claim 1, wherein a distance between adjacent two of the battery cells (100) is not less than 2mm.

3. The battery module according to claim 1, wherein the battery bracket (400) is provided with pressure relief holes (410) corresponding to the battery cells (100) in a penetrating manner, and the explosion-proof valve of the battery cell (100) can be exposed to the lower surface of the battery bracket (400) through the pressure relief holes (410) corresponding to the battery cell (100);

the lower surface of the battery holder (400) is provided with an extension protrusion (430), and the extension protrusion (430) is extended in a direction away from the battery holder (400).

4. The battery module according to claim 3, wherein the plurality of extension protrusions (430) are circumferentially uniformly distributed around the pressure release hole (410).

5. The battery module according to claim 3 or 4, wherein the extension protrusion (430) is provided with a buffer surface (431) near the pressure release hole (410), and the buffer surface (431) is an arc surface with an opening facing the pressure release hole (410).

6. The battery module according to claim 5, wherein the buffer surface (431) is provided with a rib (432), and the rib (432) extends toward the pressure release hole (410);

the reinforcing rib (432) is connected to the battery holder (400).

7. The battery module according to claim 3 or 4, wherein a plurality of limit protrusions (420) are arranged on the peripheral side of the pressure relief hole (410), a limit surface (421) is arranged on the limit protrusion (420) towards the pressure relief hole (410), and the limit surface (421) is an arc surface with an opening towards the pressure relief hole (410);

the limit protrusion (420) is positioned on the upper surface of the battery bracket (400).

8. The battery module according to claim 1, wherein the CCS assembly (200) includes:

a tray (240);

a positive electrode bus bar (210) provided at one end of the tray (240);

a negative electrode busbar (212) provided at the other end of the tray (240) and arranged opposite to the positive electrode busbar (210);

the guide bars (211) are arranged on the tray (240), a plurality of guide bars (211) are sequentially connected in series along the positive electrode bus bar (210) to the negative electrode bus bar (212), and the positive electrode bus bar (210) and the negative electrode bus bar (212) are respectively connected in series with the guide bars (211) adjacent to the positive electrode bus bar and the negative electrode bus bar; and

a flexible circuit board (230) provided on one side in the width direction of the tray (240);

defining an end of the tray (240) on which the positive electrode bus bar (210) is assembled as a positive electrode end, and an end of the tray (240) on which the negative electrode bus bar (212) is assembled as a negative electrode end;

the positive and negative terminals are each provided with a mounting seat (241) for fitting a connector (220), and the flexible circuit board (230) is connected to the connector (220).

9. The battery module according to claim 8, wherein a detection nickel plate (233) for connecting to at least one of the positive electrode bus bar (210), the negative electrode bus bar (212) and the flow guide bar (211) is provided on the flexible circuit board (230);

the tray (240) is provided with accommodating grooves (242) on both sides in the width direction thereof for accommodating the detection nickel pieces (233) on the flexible circuit board (230).

10. The battery module according to claim 9, wherein a plurality of the receiving grooves (242) defined at one side in the width direction of the tray (240) are a first groove group, and a plurality of the receiving grooves (242) defined at the other side in the width direction of the tray (240) are a second groove group;

the first groove group and the second groove group are arranged on the tray (240) in a central symmetry mode.

11. The battery module according to any one of claims 8 to 10, wherein the mount (241) at the positive end and the mount (241) at the negative end are arranged centrally and symmetrically on the tray (240).

12. A battery pack comprising an upper liquid cooling plate and the battery module according to any one of claims 1 to 11;

the upper liquid cooling plate is attached to the upper surface of the heat conduction structural adhesive (300).

13. The battery pack of claim 12, further comprising a lower liquid cooling plate, the battery holder (400) abutting the lower liquid cooling plate.