CN219303856U

CN219303856U - Battery pack and power utilization device

Info

Publication number: CN219303856U
Application number: CN202320631542.3U
Authority: CN
Inventors: 向灵; 章驰威; 杨坤; 郭鹏; 童成操; 彭嘉迁; 黄锡运
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-07-04
Anticipated expiration: 2033-03-27

Abstract

The utility model provides a battery pack and an electric device, wherein the battery pack comprises: the battery cell module comprises a box body, a battery cell module, a limit strip and heat dissipation structural adhesive, wherein a heat exchange plate is arranged on the bottom surface of the box body; the battery cell module is arranged on the heat exchange plate and is provided with a radiating surface; the limit strips are arranged on the box body and supported between the heat exchange plate and the heat radiating surface so as to form a filling limit cavity between the heat exchange plate and the heat radiating surface; and the heat radiation structural adhesive is filled in the filling limiting cavity and transfers heat with the heat exchange plate and the heat radiation surface. The utility model provides a through set up spacing on the box, when can alleviate the module income case, heat radiation structure glues because of the module is not horizontal by the extrusion skew lead to bottom heat radiation structure glue density inhomogeneous or the crooked problem of module horizontal direction.

Description

Battery pack and power utilization device

Technical Field

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

Background

The current CTP module does not use the structure of the battery core-module-box body any more, but directly integrates the battery core on the box body, and the limit and heat dissipation treatment of the battery core in the box body are directly carried out by adopting the heat conduction structural adhesive, so that the shearing bonding strength and the heat conduction performance of the heat conduction structural adhesive can directly influence the safety performance of the battery. In the current improvement of the gluing technology of the structural adhesive, the gluing technology is mainly improved, and the proper gluing quantity is prepared through technological trial so as to ensure the heat dissipation and the bonding strength of the battery core; however, in the preparation process of the battery pack, the battery cell module often tilts in the horizontal direction in the box entering process, so that the thickness of the structural adhesive at the bottom of the battery cell module is uneven, and the limiting and heat dissipation performance of the battery cell module on the box body are further affected.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present utility model provides a battery pack and an electric device, so as to solve the technical problem of uneven thickness of structural adhesive at the bottom of a battery cell module when the battery cell module is tilted in a horizontal direction in a box-in process.

To achieve the above and other related objects, the present utility model provides a battery pack comprising: the battery cell module comprises a box body, a battery cell module, a limit strip and heat dissipation structural adhesive, wherein a heat exchange plate is arranged on the bottom surface of the box body; the battery cell module is arranged on the heat exchange plate and is provided with a radiating surface; the limit strips are arranged on the box body and supported between the heat exchange plate and the heat radiating surface so as to form a filling limit cavity between the heat exchange plate and the heat radiating surface; and the heat radiation structural adhesive is filled in the filling limiting cavity and transfers heat with the heat exchange plate and the heat radiation surface.

In an example of the battery pack of the present utility model, the filling limit cavity is surrounded by the limit bar, the heat dissipation surface, and the heat exchange plate together, or is surrounded by the limit bar, the heat dissipation surface, the heat exchange plate, and the case together.

In an example of the battery pack, three positioning surfaces are arranged at the bottom of the box body, and the three positioning surfaces correspond to three side surfaces of the battery cell module respectively; the battery cell module is characterized in that the bottom end of the battery cell module is at least provided with two limiting strips, wherein the first limiting strip is arranged on one side of the side surface of the battery cell module, which is not positioned, and two ends of the first limiting strip are respectively abutted with two opposite positioning surfaces, and a limiting ring is formed at the bottom of the box body.

In an example of the battery pack of the present utility model, the volume of the limit ring is matched with the amount of the heat dissipation structure adhesive.

In an example of the battery pack, the limiting strips are arranged at two ends of the battery cell module in the width direction; at least two cross beams are arranged on the box body, the two cross beams are arranged at two ends of the battery cell module in the length direction, and a closed limit ring is enclosed between the two cross beams and the two limit strips.

In an example of the battery pack of the present utility model, the cross section of the limit bar is a rectangular structure, and the long side of the rectangular structure is the height direction of the limit bar.

In an example of the battery pack of the present utility model, the limit strips are made of silica gel.

In one example of the battery pack of the present utility model, the limit bar is adhesively fixed to the case.

In an example of the battery pack of the present utility model, the heat exchange plate is a liquid cooling plate. .

An electrical device comprising a plurality of the battery packs described in the above embodiments, wherein the battery packs are configured to provide electrical energy.

According to the battery pack and the power consumption device, the limiting strips are arranged between the heat exchange plates and the radiating surfaces, when the battery cell module is put into the box, the radiating surfaces at the bottom of the battery cell module are supported on the limiting strips, the placing height of the battery cell module on the box body is limited by the height of the limiting strips, so that the thickness of the heat dissipation structural adhesive between the battery cell module and the box body is limited, the thickness of the heat dissipation structural adhesive between the battery cell module and the box body is not influenced by the deflection of the battery cell module in the horizontal direction when the battery cell module is put into the box, the uniformity of the thickness of the structural adhesive at the bottom of the battery cell module can be improved, and the limiting capacity and the heat dissipation performance of the battery cell module on the box body are improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a partial structure of a battery pack according to an embodiment of the present application;

FIG. 2 is a schematic view of a battery pack with a cell module removed according to an embodiment of the present application;

FIG. 3 is a schematic view of a partial structure of a cell module in a battery pack mounted on a case according to an embodiment of the present application;

FIG. 4 is a schematic view of a partial structure of a portion of a cell module in a battery pack mounted on a case according to an embodiment of the present application;

FIG. 5 is an exploded view of a partial cell module in a battery pack on a housing in one embodiment of the present application;

FIG. 6 is a schematic view of the mounting locations between the cell modules and the stringers and stop bars in a battery pack according to an embodiment of the present disclosure;

fig. 7 is a front view of a partial structure of the battery pack of fig. 6;

fig. 8 is a schematic structural diagram of a limit bar in an embodiment of the present application.

Description of element reference numerals

1. A battery pack; 11. a case; 111. a heat exchange plate; 113. a cross beam; 114. a longitudinal beam; 12. a cell module; 121. a heat radiating surface; 13. a limit bar; 14. heat radiation structural adhesive; 15. filling a limit cavity; 16. and a limit ring.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. 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 and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

In this application, the battery cell module includes a plurality of battery cells, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, and the embodiment of the application is not limited thereto. The cell may be in a cylindrical, flat, rectangular, or other shape, and the embodiments of the present application are not limited in this regard. Reference to a cell module in embodiments of the present application refers to a single physical module that includes one or more cells to provide higher voltage and capacity. The battery pack referred to in the present application may include a battery module or a battery, etc. The battery pack typically includes a housing for enclosing one or more battery cell modules. The box body can avoid liquid or other foreign matters from affecting the charge or discharge of the battery cell module.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug connected to the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and the positive lug is not coated with the positive active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab connected to the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The battery cell also includes a housing having an opening and for receiving an electrode assembly, and an end cap, into which the electrode assembly can be fitted via the opening of the housing. The end cap is used for covering the opening of the shell to realize sealing.

Referring to fig. 1 to 8, the present utility model provides a battery pack 1 and an electric device, wherein a limit bar 13 is disposed at the bottom of a box 11, so that when a battery cell module 12 is put into the box, the bottom can be supported on the limit bar 13, so that the height between the whole heat dissipation surface 121 (not shown in the figure) of the battery cell module 12 and a heat exchange plate 111 on the box 11 is uniform, and thus the thickness direction of a heat dissipation structural adhesive 14 between the battery cell module 12 and the box 11 on the whole heat dissipation surface 121 (not shown in the figure) of the battery cell module 12 is uniformly distributed, and the influence of the horizontal skew of the battery cell module 12 on the thickness of the structural adhesive is reduced.

Referring to fig. 1, 2 and 3, the present utility model provides a battery pack 1, comprising: the battery cell module 12, the limit strips 13 and the heat dissipation structural adhesive 14 (not shown in the figure), wherein a heat exchange plate 111 is arranged on the bottom surface of the case 11; a cell module 12, wherein the cell module 12 is mounted on the heat exchange plate 111 and has a heat dissipation surface 121 (not shown in the figure); the limit bar 13 is mounted on the case 11 and supported between the heat exchange plate 111 and the heat radiating surface 121 (not shown) to form a filling limit chamber 15 between the heat exchange plate 111 and the heat radiating surface 121 (not shown); the heat dissipation structure glue 14 (not shown) is filled in the filling limit cavity 15, and transfers heat between the heat exchange plate 111 and the heat dissipation surface 121 (not shown).

The box 11 comprises a base, a heat exchange plate 111 and a shell (not shown in the figure), wherein the heat exchange plate 111 can be installed on the base in any connection mode such as bolts, welding connection and the like, the shell is covered on the base, a containing cavity is formed between the shell and the base, and one or more battery cell modules 12 are horizontally arranged in the containing cavity; the limiting strips 13 are arranged on the heat exchange plate 111 in any connection mode such as gluing, bolting and the like, the limiting strips 13 can be a single limiting strip, a supporting ring is formed by surrounding the base, and a plurality of limiting strips are distributed on the heat exchange plate 111 at intervals to form a supporting ring; the support ring can be closed or open; filling the heat dissipation structure glue 14 (not shown in the figure) in the support ring, wherein the filling height of the heat dissipation structure glue 14 (not shown in the figure) is not lower than the peripheral height of the support ring; when the cell module 12 is placed on the base, under the action of gravity of the cell module 12, the heat dissipation surface 121 (not shown in the figure) at the bottom end of the cell module 12 is pressed against the heat dissipation structural adhesive 14 (not shown in the figure), and meanwhile, the heat dissipation surface 121 (not shown in the figure) at the bottom end of the cell module 12 is supported on one side surface of the limit bar 13 away from the heat exchange plate 111; at this time, a filling limit cavity 15 is formed among the heat exchange plate 111, the support ring and the heat dissipation surface 121 (not shown in the figure), and the heat dissipation structural adhesive 14 (not shown in the figure) is compacted and filled in the filling limit cavity 15, so as to realize the bonding and fixing of the cell module 12 on the base. By the arrangement, the distance between the radiating surface 121 (not shown in the figure) at the bottom end of the cell module 12 and the heat exchange plate 111 is uniform on the horizontal plane, so that the sinking depth of the cell module 12 pressed on the radiating structural adhesive 14 is uniform, the uniformity of the density of the radiating structural adhesive 14 (not shown in the figure) at the bottom end of the radiating surface 121 (not shown in the figure) is improved, and the bonding strength and the radiating performance of the cell module 12 on the box 11 are improved; in addition, the limit strip 13 has simple structure, convenient installation and strong feasibility; furthermore, the limit strips 13 occupy smaller installation area, and have smaller influence on the heat dissipation performance of the battery cell module 12.

Referring to fig. 2 and 3, in an example of the battery pack 1 of the present utility model, the filling space 15 is defined by the space 13, the heat dissipation surface 121 (not shown), and the heat exchange plate 111, or by the space 13, the heat dissipation surface 121 (not shown), the heat exchange plate 111, and the case 11. The size of the filling limit cavity 15 in the horizontal direction affects the filling amount of the heat dissipation structural adhesive 14, and further affects the bonding strength of the cell module 12 on the heat dissipation structural adhesive 14, and the size of the filling limit cavity 15 in the horizontal direction also affects the heat dissipation performance of the heat dissipation surface 121 (not shown in the figure), so that, in order to meet the requirements of the bonding strength and the heat dissipation performance of the cell module 12, it is known that the horizontal area size of the filling limit cavity 15 should be as close to the area size of the heat dissipation surface 121 (not shown in the figure) as possible. Because the shape of the battery cell may be any shape such as a cylinder, a cuboid, or a cube, the shape of the battery cell module 12 formed by the plurality of battery cells may also be any shape such as a cylinder, a cuboid, or a cube, so that the heat dissipation surface 121 (not shown in the figure) at the bottom end of the battery cell module 12 may be any geometric shape such as a circle, a square, or a rectangle. In an embodiment, the filling space-limiting cavity 15 is surrounded by the space-limiting strip 13, the heat-dissipating surface 121 (not shown in the figure) and the heat-exchanging plate 111, because the space-limiting strip 13 can be easily spliced into a supporting ring with any geometric shape, and the supporting ring, the heat-dissipating surface 121 (not shown in the figure) and the heat-exchanging plate 111 are combined into the filling space-limiting cavity 15 with any cross-sectional shape, so that the heat-dissipating surface 121 (not shown in the figure) with different shapes can be better matched, thereby meeting the bonding strength and the heat-dissipating performance of the battery cell module 12 on the heat-dissipating structural adhesive 14 (not shown in the figure). In another embodiment, the filling limit cavity 15 is surrounded by the limit bar 13, the heat dissipating surface 121 (not shown in the figure), the heat exchanging plate 111 and the case 11. The side walls constituting the filling limit cavity 15 may include one side wall of the case 11 or a plurality of side walls of the case 11, and the limit bars 13 may participate in constituting the side walls of the filling limit cavity 15 while supporting the heat radiating surface 121 (not shown); or the side walls of the filling limit cavity 15 are all formed by the side walls of the box body 11, and the limit strips 13 do not participate in forming the side walls of the filling limit cavity 15 and only support the radiating surface 121 (not shown in the figure). By the arrangement, the use amount of the limiting strip 13 can be reduced, and the installation efficiency of the limiting strip 13 is improved.

Referring to fig. 2 and 3, in an example of the battery pack 1 of the present utility model, two positioning surfaces are disposed at the bottom of the case 11, and the two positioning surfaces respectively correspond to two side surfaces of the battery module 12 in the length direction; the bottom end of the battery cell module 12 is at least provided with two limiting strips 13, wherein two limiting strips 13 are respectively arranged at two ends of the width direction of the battery cell module 12, two ends of the length direction of the limiting strips 13 are respectively abutted with two positioning surfaces, and a limiting ring 16 is formed at the bottom of the box 11. During use, the cell module 12 is not allowed to shift in the case 11, so that positioning surfaces are arranged in the case 11 and used for positioning the cell module 12 at the side edge in the case 11, so that the probability of shifting the cell module 12 in the case 11 is reduced. In this embodiment, at least two limiting strips 13 are disposed at intervals below the heat dissipation surface 121 (not shown) of the cell module 12, and the limiting strips 13 can provide stable support for the heat dissipation surface 121 (not shown) of the cell module 12; wherein two spacing 13 set up respectively at the width direction's of box 11 both ends, and support on the heat dissipation face 121 of electric core module 12, spacing 13 length direction's both ends respectively with two locating surfaces butt on the box 11, and then form a spacing collar 16 between two locating surfaces and two spacing 13 of box 11. The setting of the limit ring 16 can reduce the overflow of the heat dissipation structure glue 14 (not shown in the figure) filled in the limit cavity 15, and meet the glue consumption of the lower end of the heat dissipation surface 121 (not shown in the figure) of the battery cell module 12, thereby improving the bonding strength of the battery cell module 12 on the box 11.

Referring to fig. 2 and 3, in an example of the battery pack 1 of the present utility model, the size of the limit ring 16 is matched with the amount of the heat dissipation structure adhesive 14 (not shown). In the actual production process, the usage amount of the heat dissipation structure adhesive 14 (not shown in the figure) can be calculated by multiplying the coverage area of the heat dissipation structure adhesive 14 (not shown in the figure) in the horizontal direction by the thickness, and if the laying thickness of the heat dissipation structure adhesive 14 (not shown in the figure) has deviation, the uniform distribution of the heat dissipation structure adhesive 14 (not shown in the figure) is affected, and the uniform heat dissipation of the battery cells is further affected; in this embodiment, the height of the stop collar 16 determines the glue thickness of the heat dissipation structure glue 14 (not shown in the figure), and the height of the stop collar 16 is equal to the height of the stop bar 13, so that the amount of the heat dissipation structure glue 14 (not shown in the figure) can be calculated by multiplying the height of the stop bar 13 by the area of the stop collar 16, and further, the adjustment of the amount of the heat dissipation structure glue 14 (not shown in the figure) can be realized by changing the volume of the stop collar 16. The adjustment of the volume of the limit ring 16 can be realized by adjusting the height of the limit bar 13 or the area of the limit ring 16, the adjustment mode is simple to operate and has higher flexibility, and the dosage of the heat dissipation structure adhesive 14 (not shown in the figure) is easy to control, so as to adjust the bonding strength of the battery cell module 12 on the box 11 and the heat dissipation performance. When the area of the limit ring 16 is fixed, the thickness of the limit bar 13 can be changed according to the process requirement so as to adjust the consumption of the heat dissipation structure adhesive 14 (not shown in the figure); meanwhile, the limiting strips 13 with fixed thickness can assist in controlling the final glue pressing thickness of the structural glue in the glue pressing process of the module in the box, so that the uniform structural glue thickness in the same box 11 or among different boxes 11 is ensured.

Referring to fig. 2 to 5, in an example of the battery pack 1 of the present utility model, the limit bars 13 are provided in two pieces, and the two limit bars 13 are provided at two ends of the width direction of the battery module 12; at least two cross beams 113 are arranged on the box 11, the two cross beams 113 are arranged at two ends of the battery cell module 12 in the length direction, and a closed limit ring 16 is enclosed between the two cross beams 113 and the two limit strips 13. The case 11 may be provided with one cell module 12 or a plurality of cell modules 12, and the number of cell modules 12 is related to the amount of electricity to be provided by the battery pack 1. In order to improve the supporting strength of the box 11, the box 11 is generally provided with cross beams 113 and longitudinal beams 114, the cross beams 113 and the longitudinal beams 114 are arranged in a staggered and crisscross manner and fixed on the base of the box 11 in a manner of welding or bolting, and meanwhile, the cross beams 113 and the longitudinal beams 114 divide the base of the box 11 into a plurality of placement areas with equal size, and the placement areas are provided with openings on one surface perpendicular to the length direction of the cross beams 113. The two ends of the cell module 12 in each placement area in the length direction are respectively abutted against the cross beams 113 at the two ends of the placement area in the length direction, so that the cell module 12 is positioned on the base of the box 11 in the length direction; the two limiting strips 13 are arranged at two ends of the cell module 12 in the width direction at intervals, and two ends of the two limiting strips 13 in the length direction are abutted with the cross beams 113 at two ends of the cell module 12 in the length direction, so that a closed limiting ring 16 is enclosed between the two cross beams 113 and the two limiting strips 13. The arrangement of the closed limit ring 16 can further reduce the overflow of the heat dissipation structure adhesive 14 (not shown in the figure) in the filling limit cavity 15, and better ensure the filling quantity of the heat dissipation structure adhesive 14 (not shown in the figure) at the lower end of the heat dissipation surface 121 (not shown in the figure), so that the heat dissipation structure adhesive 14 (not shown in the figure) at the lower end of the battery cell module 12 realizes ideal bonding strength and heat conduction effect.

Referring to fig. 6, in an example of the battery pack 1 of the present utility model, the cross section of the limit bar 13 is a rectangular structure, and the long side of the rectangular structure is the width direction of the limit bar 13. Under the same material, the cross section shape of the limit bar 13 can affect the supporting strength of the limit bar 13, and in the embodiment, the cross section shape of the limit bar 13 is designed to be a rectangular structure, because under the same material area, compared with a round cross section, the rectangular cross section has better comprehensive mechanical properties such as bending resistance, torsion resistance and the like, and the length of the rectangular structure is taken as the width direction of the limit bar 13, so that the supporting stability of the limit bar 13 to the cell module 12 is improved; in this embodiment, the coating area of the heat dissipation structure adhesive 14 (not shown in the figure) can reach 96% of the total area of the heat dissipation surface 121 at the bottom end of the cell module 12, and can completely meet the bonding strength requirement and good heat conduction performance of the cell module 12 on the base of the case 11.

Referring to fig. 1, in an example of the battery pack 1 of the present utility model, the limit bar 13 is made of silica gel. When the battery cell module 12 falls onto the limit strip 13 under the action of gravity, an impact force is generated between the limit strip 13 and the battery cell module 12, and when the impact force is overlarge, a certain influence is caused on the internal structure of the battery cell module 12, and in order to reduce the impact force, in the application, the limit strip 13 is made of an elastic material, and then a buffer effect is generated when the battery cell module 12 is placed, so that the influence of the impact force on the battery cell module 12 is reduced; by comparing the hardness of the materials, the limit bar 13 is preferably made of silica gel in this embodiment; in other embodiments, any elastic material that meets the requirement of supporting hardness, such as rubber material, nylon material, etc. may be used.

Referring to fig. 2, in an example of the battery pack 1 of the present utility model, the limit bar 13 is adhesively fixed to the case 11. The limiting strip 13 is fixed on the box body 11 in a single-sided back adhesive mode, the back adhesive is smeared on one side of the limiting strip 13, which is abutted against the heat exchange plate 111, and the adhesive force of the adhesive is more than 50N/cm < 2 >, so that the limiting strip 13 is fixedly connected to the heat exchange plate 111 of the box body 11 in an adhesive mode; two limiting strips 13 adhered below each cell module 12 are arranged in parallel along the width direction of the cell module 12, and the outer side surface of the limiting strip 13 near the non-positioned side of the cell module 12 is flush with the outer side edge of the cell module 12. The stop bar 13 is mounted on the heat exchange plate 111 by means of gluing, which is easy to operate, and can improve the mounting efficiency of the stop bar 13 on the case 11. In other embodiments, the connection manner in which the limit bar 13 is fixed on the case 11 may be implemented by any of bolting or clamping the limit bar 13.

Referring to fig. 1, in an example of the battery pack 1 of the present utility model, the heat exchange plate 111 is a liquid cooling plate. The battery pack 1 further includes a thermal management member for adjusting the temperature of the battery cell module 12, which is referred to herein as "adjusting the temperature" to heat or cool the battery cell module. For example, the thermal management component is used to contain a fluid, which may be a liquid or a gas such as water, a mixture of water and glycol, or air, etc., to regulate the temperature of the cell module 12. The heat exchange plate 111 is connected with the heat dissipation surface 121 of the cell module 12 through a heat dissipation structural adhesive 14 (not shown in the figure), so as to realize heat conduction in the working process of the cell module 12; in this embodiment, cooling liquid is introduced into the heat exchange plate 111, and the flow of the cooling liquid in the heat exchange plate 111 is controlled by the thermal management component, so as to adjust the temperature of the heat exchange plate 111, thereby adjusting the working temperature of the cell module 12. By liquid cooling the heat exchange plate 111, the operating temperature of the battery cell module 12 can be better adjusted, and the heat dissipation performance of the battery cell module 12 can be improved. In the present embodiment, the cooling liquid may be an alcohol type, a glycerin type, a glycol type, or the like, and is not limited thereto.

In an example of the power utilization device of the present utility model, the power utilization device includes a plurality of the battery packs 1, and the battery packs 1 are used for providing electric energy. In the present application, the electric device may be a vehicle, a cellular phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular. In this embodiment, for convenience of explanation, an electric device is taken as an example of a vehicle. The battery pack 1 is arranged in the vehicle, the battery pack 1 can be arranged at the bottom or the head or the tail of the vehicle, and the battery can be used for supplying power to the vehicle and can also be used as an operating power supply of the vehicle.

According to the battery pack 1 and the power utilization device, the limiting strips 13 are arranged, so that the battery cell module 12 is put into the box, and the problem that the density of the bottom heat dissipation structure glue 14 (not shown) is uneven or the battery cell module 12 is inclined in the horizontal direction due to the fact that the battery cell module 12 is not horizontally extruded and offset is solved; the distance between the cell module 12 and the box 11 can be controlled by controlling the height of the limit bar 13, so that the final glue pressing thickness of the heat dissipation structure glue 14 (not shown in the figure) is controlled, and the consumption error of the heat dissipation structure glue 14 (not shown in the figure) is reduced; the limiting rubber strip is provided with the limiting ring 16 at the bottom of the box 11, and the heat exchange plate 111 and the heat dissipation surface 121 of the battery cell module 12 are combined to form the filling limiting cavity 15, so that overflow of the heat dissipation structural rubber 14 (not shown in the figure) can be reduced, and the bonding strength and the heat conduction performance of the battery cell module 12 on the box 11 are further improved. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance. The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A battery pack, comprising:

the box body is provided with a heat exchange plate on the bottom surface;

the battery cell module is arranged on the heat exchange plate and is provided with a radiating surface;

the limiting strip is arranged on the box body and supported between the heat exchange plate and the radiating surface so as to form a filling limiting cavity between the heat exchange plate and the radiating surface;

and the heat radiation structure glue is filled in the filling limiting cavity and transfers heat with the heat exchange plate and the heat radiation surface.

2. The battery pack of claim 1, wherein the filling spacing cavity is defined by the spacing bar, the heat dissipating surface, the heat exchanging plate, or by the spacing bar, the heat dissipating surface, the heat exchanging plate, and the case.

3. The battery pack according to claim 2, wherein the bottom of the case is provided with two positioning surfaces, the two positioning surfaces respectively corresponding to two side surfaces of the battery cell module in the length direction; the battery cell module is characterized in that two limiting strips are arranged at least at the bottom end of the battery cell module, wherein the two limiting strips are respectively arranged at two ends of the battery cell module in the width direction, two ends of the limiting strip in the length direction are respectively abutted with two positioning surfaces, and a limiting ring is formed at the bottom of the box body.

4. The battery pack of claim 3, wherein the volume of the retainer ring is sized to match the amount of heat sink structural adhesive.

5. A battery pack according to claim 3, wherein the limit bars are provided in two pieces, the two limit bars being provided at both ends in the cell module width direction; at least two cross beams are arranged on the box body, the two cross beams are arranged at two ends of the battery cell module in the length direction, and a closed limit ring is enclosed between the two cross beams and the two limit strips.

6. The battery pack according to claim 1, wherein the stopper bar has a rectangular structure in cross section, and a long side of the rectangular structure is a width direction of the stopper bar.

7. The battery pack of claim 1, wherein the stop bar is a silicone material.

8. The battery pack of claim 1, wherein the limit bar is adhesively secured to the housing.

9. The battery pack according to any one of claims 1 to 8, wherein the heat exchange plate is a liquid cooling plate.

10. An electrical device comprising a plurality of battery packs according to claim 9 for providing electrical energy.