Battery pack and energy storage device

Abstract

The application discloses a battery pack and an energy storage device, which comprise at least one battery module, a box body and at least one limiting assembly. The box body is used for accommodating the battery module. The box body is provided with a positioning protrusion corresponding to each battery module and two limiting grooves corresponding to each positioning protrusion and respectively located on both sides of the positioning protrusion along a second direction. Each limiting assembly comprises a first limiting pressing strip and a second limiting pressing strip which are arranged at intervals along the second direction. The first limiting pressing strip is partially arranged between the battery module and the positioning protrusion, and the first limiting pressing strip is partially arranged in the limiting groove on one side of the positioning protrusion. The second limiting pressing strip is partially arranged between the battery module and the positioning protrusion, and the second limiting pressing strip is partially arranged in the limiting groove on the other side of the positioning protrusion. The first limiting pressing strip and the second limiting pressing strip are used for fixing the battery module to the box body. The battery pack adopting the application has high fixing reliability of the battery module in the box body, and the assembly difficulty of the battery module is low.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery pack and energy storage device. Background Technology

[0002] In related technologies, battery modules in battery packs are composed of multiple individual battery cells arranged together, and these cells are clamped and fixed by two end caps. The battery modules are typically secured within the battery pack housing using fasteners such as bolts and studs. These fasteners pass through the two end caps along the arrangement of the individual battery cells and are then locked into the housing. This method of securing battery modules in battery packs has low reliability and makes the assembly of the battery modules quite difficult. Summary of the Invention

[0003] This invention discloses a battery pack and energy storage device. The battery module has high fixation reliability inside the housing and the assembly difficulty of the battery module is low.

[0004] In a first aspect, embodiments of the present invention disclose a battery pack, including at least one battery module, a housing, and at least one limiting component. Each battery module includes a plurality of battery cells arranged along a first direction. The housing is used to accommodate the battery module. The housing is provided with a positioning protrusion corresponding to each battery module. The housing is also provided with two limiting grooves corresponding to each positioning protrusion, located on both sides of the positioning protrusion along a second direction, the second direction being perpendicular to the first direction. Each limiting component includes a first limiting strip and a second limiting strip spaced apart along the second direction. The first limiting strip is partially disposed between the battery module and the positioning protrusion. The first limiting strip is partially disposed in the limiting groove on one side of the positioning protrusion. The second limiting strip is partially disposed between the battery module and the positioning protrusion. The second limiting strip is partially disposed in the limiting groove on the other side of the positioning protrusion. The first limiting strip and the second limiting strip are used to fix the battery module to the housing.

[0005] In this way, the battery module is more reliably fixed inside the casing, and the assembly of the battery module is less difficult.

[0006] As an optional implementation, in this embodiment of the invention, the first limiting strip includes a first support portion, a first limiting portion, and a first positioning portion. The first support portion is at least partially disposed between the battery module and the positioning protrusion. The first limiting portion is perpendicularly connected to the first support portion. The first limiting portion extends upward from its connection with the first support portion along the height direction of the battery module away from the limiting groove and abuts against one side of the battery module along the second direction. The first positioning portion is connected to the first support portion. The first positioning portion extends downward from its connection with the first support portion along the height direction away from the first limiting portion and engages with the limiting groove.

[0007] In this way, by engaging the first positioning part with the limiting groove, the first limiting strip can be fixed to the housing. The first support part can support the battery module between the battery module and the positioning protrusion, and the first limiting part abuts against one side of the battery module along the second direction. Thus, the first limiting part can restrict the movement of the battery module along the second direction, thereby fixing the battery module to the housing.

[0008] As an optional implementation, in this embodiment of the invention, the second limiting strip includes a second support portion, a second limiting portion, and a second positioning portion. The second support portion is at least partially disposed between the battery module and the positioning protrusion. The second limiting portion is perpendicularly connected to the second support portion. The second limiting portion extends upward from its connection with the second support portion along the height direction of the battery module away from the limiting groove and abuts against the other side of the battery module along the second direction. The second positioning portion is connected to the second support portion. The second positioning portion extends downward from its connection with the second support portion along the height direction away from the second limiting portion and engages with the limiting groove.

[0009] In this way, by engaging the second positioning part with the limiting groove, the second limiting strip can be fixed to the housing. The second support part can support the battery module between the battery module and the positioning protrusion, and the second limiting part abuts against one side of the battery module along the second direction. Thus, the second limiting part can restrict the movement of the battery module along the second direction, thereby fixing the battery module to the housing.

[0010] As an optional implementation, in this embodiment of the invention, both sides of the positioning protrusion along the second direction are inclined surfaces, and the inclined surfaces form an inclined angle with the bottom surface of the limiting groove.

[0011] In this way, when the first and second limiting pressure strips are assembled into the housing, the first positioning part and the second positioning part can respectively use the inclined surfaces on both sides of the positioning protrusion as guides to engage with the limiting grooves on both sides of the positioning protrusion, reducing the difficulty of engaging and assembling the first positioning part and the second positioning part with the limiting grooves.

[0012] As an optional implementation, in this embodiment of the invention, the inclination angle formed by the inclined surface and the bottom surface of the limiting groove is α, where 90° < α ≤ 150°.

[0013] In this way, the inclined surface can form an inclined angle with the bottom surface of the limiting groove, and the protrusion height of the positioning protrusion is large, the depth of the limiting groove is large, and the reliability of the engagement between the first positioning part and the second positioning part and the limiting groove is high.

[0014] As an optional implementation, in this embodiment of the invention, the battery pack has a plurality of battery modules, which are arranged side by side at intervals along the second direction, and the limiting groove between the two positioning protrusions corresponding to two adjacent battery modules is the same limiting groove.

[0015] In this way, the battery pack's capacity and output power can be increased by using multiple battery modules. Furthermore, the multiple battery modules are arranged side by side and spaced apart along the second direction, which is perpendicular to the arrangement direction of the multiple battery cells in the battery module. This makes full use of the space in the housing, resulting in a more compact overall structure of the battery pack. It also reduces the space occupied by the battery modules and is conducive to the miniaturization design of the battery pack.

[0016] As an optional implementation, in this embodiment of the invention, the battery pack further includes at least one liquid cooling plate disposed between the battery modules.

[0017] In this way, two adjacent battery modules can share a single liquid cooling plate, which reduces the number of liquid cooling plates and thus lowers the overall cost of the battery pack.

[0018] As an optional implementation, in this embodiment of the invention, the spacing between two adjacent battery modules along the second direction is equal to the thickness of the liquid cooling plate.

[0019] In this way, when the battery modules are installed in the housing, the space between two adjacent battery modules can just accommodate a liquid cooling plate. At this time, the two sides of the liquid cooling plate are in contact with the two battery modules respectively, and the two battery modules can clamp the liquid cooling plate in the housing to fix the liquid cooling plate.

[0020] As an optional implementation, in this embodiment of the invention, the battery pack further includes a plurality of thermal pads, and the thermal pads are respectively provided on both sides of the liquid cooling plate, and the thermal pads contact the battery module.

[0021] In this way, by setting up a thermal pad, the thermal conductivity between the battery module and the liquid cooling plate can be improved, thereby improving the cooling effect of the liquid cooling plate.

[0022] As an optional implementation, in this embodiment of the invention, the spacing between two adjacent battery modules along the second direction is equal to the sum of the thickness of the liquid cooling plate and the thickness of the two thermal pads on both sides of the liquid cooling plate.

[0023] In this way, when the battery modules are installed in the housing, the space between two adjacent battery modules can just accommodate one liquid cooling plate and two thermal pads. At this time, the two thermal pads on both sides of the liquid cooling plate are in contact with the two battery modules respectively. The two battery modules can clamp the liquid cooling plate and thermal pads in the housing, thus fixing the liquid cooling plate and thermal pads.

[0024] Secondly, embodiments of the present invention disclose an energy storage device, including the battery pack of the first aspect. It is understood that the energy storage device of the second aspect has the beneficial effects of the battery pack of the first aspect.

[0025] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0026] In this embodiment of the invention, at least one battery module is housed within a housing. Each battery module comprises multiple individual battery cells arranged along a first direction. A positioning protrusion is provided for each battery module within the housing, and two limiting grooves are respectively located on opposite sides of the positioning protrusion along a second direction. The limiting components include a first limiting strip and a second limiting strip arranged side-by-side along the second direction. The first limiting strip is partially positioned between the battery module and the positioning protrusion, and partially positioned in the limiting groove on one side of the positioning protrusion. The second limiting strip is partially positioned between the battery module and the positioning protrusion, and partially positioned in the limiting groove on the other side of the positioning protrusion. Thus, the first and second limiting strips can secure the battery module to the housing, resulting in high reliability of the battery module's fixation within the housing. Furthermore, during assembly, the battery module and the corresponding limiting components can be installed together into the housing. At this time, the first and second limiting strips assemble with the limiting grooves of the housing, simultaneously securing the battery module to the positioning protrusion of the housing, thus reducing the difficulty of assembling the battery module. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a battery pack disclosed in Embodiment 1 of the present invention;

[0029] Figure 2 This is an exploded structural diagram of a battery pack disclosed in Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of a battery pack disclosed in Embodiment 1 of the present invention;

[0031] Figure 4 yes Figure 3 Enlarged structural diagram at point I;

[0032] Figure 5 yes Figure 3 Enlarged structural diagram at point II;

[0033] Figure 6 This is an exploded structural diagram of the battery module disclosed in Embodiment 1 of the present invention;

[0034] Figure 7 This is a simplified structural diagram of the energy storage device disclosed in Embodiment 2 of the present invention.

[0035] Explanation of main figure symbols

[0036] 100. Battery pack; 10. Battery module; 11. Battery cell; 12. End plate; 13. Cable tie; 14. Insulating cover; 20. Housing; 201. Bottom shell; 202. Top cover; 21. Positioning protrusion; 21a. Inclined surface; 22. Limiting groove; 30. Limiting assembly; 31. First limiting pressure strip; 311. First support part; 312. First limiting part; 313. First positioning part; 32. Second limiting pressure strip; 321. Second support part; 322. Second limiting part; 323. Second positioning part; 40. Liquid cooling plate; 50. Thermal pad; 61. Liquid supply pipe; 62. Liquid outlet pipe; 200. Energy storage device; x, first direction; y, second direction; z, height direction. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0041] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0042] This invention discloses a battery pack and energy storage device, which has low cost and high cooling efficiency.

[0043] Example 1

[0044] Please refer to the following: Figures 1 to 3This is a schematic diagram of the structure of a battery pack 100 provided in Embodiment 1 of the present invention. The battery pack 100 includes at least one battery module 10, a housing 20, and at least one limiting component 30. Each battery module 10 includes a plurality of battery cells 11 arranged along a first direction x. The housing 20 is used to accommodate the battery module 10. The housing 20 is provided with a positioning protrusion 21 corresponding to each battery module 10. The housing 20 is also provided with two limiting grooves 22 located on both sides of the positioning protrusion 21 along a second direction y, corresponding to each positioning protrusion 21. The second direction y is perpendicular to the first direction x. The limiting components 30 are perpendicular to each other in the x direction. Each limiting component 30 includes a first limiting strip 31 and a second limiting strip 32 spaced apart along the second direction y. The first limiting strip is partially located between the battery module 10 and the positioning protrusion 21. The first limiting strip 31 is partially located in the limiting groove 22 on one side of the positioning protrusion 21. The second limiting strip 32 is partially located between the battery module 10 and the positioning protrusion 21. The second limiting strip 32 is partially located in the limiting groove 22 on the other side of the positioning protrusion 21. The first limiting strip 31 and the second limiting strip 32 are used to fix the battery module 10 to the housing 20.

[0045] In this embodiment, at least one battery module 10 is housed in the housing. The battery module 10 includes multiple battery cells 11 arranged along the first direction x. The housing 20 provides a positioning protrusion 21 for each battery module 10, and provides two limiting grooves 22 on both sides of the positioning protrusion 21 along the second direction y. The limiting component 30 includes a first limiting strip 31 and a second limiting strip 32 arranged side by side along the second direction y. The first limiting strip 31 is partially located between the battery module 10 and the positioning protrusion 21, and partially located in the limiting groove 22 on one side of the positioning protrusion 21. The second limiting strip 32 is partially located between the battery module 10 and the positioning protrusion 21, and partially located in the limiting groove 22 on the other side of the positioning protrusion 21. In this way, the first limiting strip 31 and the second limiting strip 32 can fix the battery module 10 to the housing 20, and the fixing reliability of the battery module 10 in the housing 20 is high. Furthermore, during assembly, the battery module 10 and the corresponding limiting component 30 can be installed together into the housing 20. At this time, while the first limiting strip 31 and the second limiting strip 32 are assembled with the limiting groove 22 of the housing 20, the battery module 10 can be fixed at the positioning protrusion 21 of the housing 20, making the assembly of the battery module 10 relatively easy.

[0046] In some embodiments, such as Figure 3 and Figure 4As shown, the first limiting strip 31 includes a first support portion 311, a first limiting portion 312, and a first positioning portion 313. The first support portion 311 is at least partially disposed between the battery module 10 and the positioning protrusion 21. The first limiting portion 312 is vertically connected to the first support portion 311. The first limiting portion 312 extends upward from the connection point with the first support portion 311 along the height z of the battery module 10, away from the limiting groove 22, and abuts against one side of the battery module 10 along the second direction y. The first positioning portion 313 is connected to the first support portion 311. The first positioning portion 313 extends downward from the connection point with the first support portion 311 along the height z, away from the first limiting portion 312, and engages with the limiting groove 22. In this way, by engaging the first positioning part 313 with the limiting groove 22, the first limiting strip can be fixed to the housing 20. The first support part 311 can support the battery module 10 between the battery module 10 and the positioning protrusion 21. Furthermore, by abutting the first limiting part 312 against one side of the battery module 10 along the second direction y, the first limiting part 312 can restrict the movement of the battery module 10 along the second direction y, thereby fixing the battery module 10 to the housing 20.

[0047] For example, such as Figure 3 and Figure 5 As shown, the second limiting strip 32 includes a second support portion 321, a second limiting portion 322, and a second positioning portion 323. The second support portion 321 is at least partially disposed between the battery module 10 and the positioning protrusion 21. The second limiting portion 322 is vertically connected to the second support portion 321. The second limiting portion 322 extends upward from the connection point with the second support portion 321 along the height z of the battery module 10, away from the limiting groove 22, and abuts against the other side of the battery module 10 along the second direction y. The second positioning portion 323 is connected to the second support portion 321. The second positioning portion 323 extends downward from the connection point with the second support portion 321 along the height z, away from the second limiting portion 322, and engages with the limiting groove 22. In this way, by engaging the second positioning part 323 with the limiting groove 22, the second limiting strip can be fixed to the housing 20. The second support part 321 can support the battery module 10 between the battery module 10 and the positioning protrusion 21, and by abutting the second limiting part 322 against one side of the battery module 10 along the second direction y, the second limiting part 322 can restrict the movement of the battery module 10 along the second direction y, thereby fixing the battery module 10 to the housing 20.

[0048] As can be seen from the above, the first positioning part 313 of the first limiting pressure strip 31 engages with the limiting groove 22 to fix the first limiting pressure strip 31 to the housing 20, and the second positioning part 323 of the second limiting pressure strip 32 engages with the limiting groove 22 to fix the second limiting pressure strip 32 to the housing 20. At the same time, the first limiting part 312 and the second limiting part 322 are used to fix the battery module 10 to the housing 20 from both sides along the second direction y, which can improve the reliability of fixing the battery module 10 in the housing 20.

[0049] The first limiting strip 31 and the second limiting strip 32 can be long strip structures with an L-shaped cross-section. The L-shaped structure is placed at one corner of the bottom of the battery module 10, which can improve the connection strength between the first limiting strip 31 and the second limiting strip 32 and the battery module 10.

[0050] In some embodiments, such as Figure 4 As shown, both sides of the positioning protrusion 21 along the second direction y are inclined surfaces 21a, and the inclined surfaces 21a form an inclined angle with the bottom surface of the limiting groove 22. In this way, when the first limiting pressure strip 31 and the second limiting pressure strip 32 are assembled to the housing 20, the first positioning part 313 and the second positioning part 323 can respectively use the inclined surfaces 21a on both sides of the positioning protrusion 21 as guides to engage with the limiting grooves 22 on both sides of the positioning protrusion 21, reducing the difficulty of engaging and assembling the first positioning part 313 and the second positioning part 323 with the limiting groove 22.

[0051] Optionally, the inclination angle formed by the inclined surface 21a and the bottom surface of the limiting groove 22 is α, where 90° < α ≤ 150°. If the inclination angle α > 150°, then the inclination angle α is relatively large, the protrusion height of the positioning protrusion 21 is relatively small, and the depth of the limiting groove 22 on both sides of the positioning protrusion 21 is also relatively small. This results in lower reliability of the engagement between the first positioning part 313 and the second positioning part 323 and the limiting groove 22. To ensure that the inclined surface 21a forms an inclination angle with the bottom surface of the limiting groove 22, the inclination angle α needs to be greater than 90°. Therefore, the inclination angle α formed by the inclined surface 21a and the bottom surface of the limiting groove 22 can be 90° < α ≤ 150°, allowing the inclined surface 21a to form an inclination angle with the bottom surface of the limiting groove 22, and resulting in a relatively large protrusion height of the positioning protrusion 21, a relatively large depth of the limiting groove 22, and higher reliability of the engagement between the first positioning part 313 and the second positioning part 323 and the limiting groove 22. Furthermore, the inclination angle α formed by the inclined surface 21a and the bottom surface of the limiting groove 22 can be 100°, 110°, 120°, 130°, 140°, 150°, etc., and this embodiment does not make a specific limitation on this.

[0052] In some embodiments, see again Figure 2 and Figure 3The battery pack 100 has multiple battery modules 10, which are arranged side-by-side at intervals along the second direction y. The limiting grooves 22 between the two positioning protrusions 21 of two adjacent battery modules 10 are the same limiting groove 22. In this way, the battery capacity and output power of the battery pack 100 can be increased by using multiple battery modules 10. Moreover, the arrangement of multiple battery modules 10 side-by-side at intervals along the second direction y is perpendicular to the arrangement direction of the multiple battery cells 11 of the battery modules 10, which can make full use of the space of the housing 20. The overall structure of the battery pack 100 is relatively compact, reducing the space occupied by the battery modules 10 and facilitating the miniaturization design of the battery pack 100.

[0053] Optionally, the battery pack 100 further includes at least one liquid cooling plate 40, which is disposed between the battery modules 10. Thus, when a liquid cooling plate 40 is disposed between two adjacent battery modules 10, the two adjacent battery modules 10 share one liquid cooling plate 40 for cooling. When no liquid cooling plate 40 is disposed between two adjacent battery modules 10, a liquid cooling plate 40 is disposed on one side of the two battery modules 10 facing away from each other. In this case, the two adjacent battery modules 10 do not share one liquid cooling plate 40, but instead share the liquid cooling plate 40 with the battery modules 10 on the other side of the two modules.

[0054] For example, such as Figure 3 As shown, the battery pack 100 has four battery modules 10 and two liquid cooling plates 40. One liquid cooling plate 40 is located between the first battery module 10 and the second battery module 10, and the other liquid cooling plate 40 is located between the third battery module 10 and the fourth battery module 10. In this way, the first battery module 10 and the second battery module 10 share one liquid cooling plate 40, and the third battery module 10 and the fourth battery module 10 share one liquid cooling plate 40. Since the second battery module 10 and the third battery module 10 are cooled by the liquid cooling plate 40, there is no need to set up a liquid cooling plate 40 between the second battery module 10 and the third battery module 10, which reduces the number of liquid cooling plates 40 and thus reduces the overall cost of the battery pack 100.

[0055] Furthermore, the distance between two adjacent battery modules 10 along the second direction y is equal to the thickness of the liquid cooling plate 40. Thus, when the battery modules 10 are installed into the housing 20, the space between two adjacent battery modules 10 can just accommodate one liquid cooling plate 40. At this time, the two sides of the liquid cooling plate 40 are in contact with the two battery modules 10 respectively, and the two battery modules 10 can clamp the liquid cooling plate 40 within the housing 20, thereby fixing the liquid cooling plate 40.

[0056] Optionally, the battery pack 100 also includes multiple thermal pads 50, with thermal pads 50 respectively provided on both sides of the liquid cooling plate 40, and the thermal pads 50 contacting the battery module 10. In this way, by setting the thermal pads 50, the heat conduction efficiency between the battery module 10 and the liquid cooling plate 40 can be improved, thereby improving the cooling effect of the liquid cooling plate 40.

[0057] Furthermore, the distance between two adjacent battery modules 10 along the second direction y is equal to the sum of the thickness of the liquid cooling plate 40 and the thickness of the two thermal pads 50 on both sides of the liquid cooling plate 40. Thus, when the battery modules 10 are installed into the housing 20, the space between two adjacent battery modules 10 can precisely accommodate one liquid cooling plate 40 and two thermal pads 50. At this time, the two thermal pads 50 on both sides of the liquid cooling plate 40 are in contact with the two battery modules 10 respectively, and the two battery modules 10 can clamp the liquid cooling plate 40 and the thermal pads 50 within the housing 20, thereby fixing the liquid cooling plate 40 and the thermal pads 50.

[0058] Optionally, the thermal pad 50 is a silicone sheet, a silicone grease sheet, or a silicone sheet, and the thermal pad 50 is pressed against the liquid cooling plate 40 and the battery module 10 on both sides of itself. On the one hand, this embodiment can provide a variety of different thermal pads 50, which can be selected according to actual conditions to meet the different usage requirements of the battery pack 100. On the other hand, the thermal pad 50 has a certain degree of elasticity and can be squeezed by the liquid cooling plate 40 and the battery module 10 on both sides of itself, ensuring that the thermal pad 50 can be tightly attached to the liquid cooling plate 40 and the battery module 10, improving the heat conduction effect of the thermal pad 50, thereby improving the cooling effect of the liquid cooling plate 40.

[0059] For example, see again Figure 1 and Figure 2 The housing 20 includes a bottom shell 201 and a top cover 202 that is connected to and fitted onto the bottom shell 201. The battery module 10 is located between the bottom shell 201 and the top cover 202, and a positioning part is located on the bottom shell 201. In this way, the space between the top cover 202 and the bottom shell 201 accommodates the battery module 10, which can protect the battery module 10. The liquid cooling plate 40 is located between adjacent battery modules 10 and can also be protected by the top cover 202 and the bottom shell 201. The bottom shell 201 is provided with positioning protrusions 21 and limiting grooves 22. During installation, the battery module 10 can be connected to the positioning protrusions 21 and limiting grooves 22 through the limiting component 30. After the battery module 10 is assembled with the bottom shell 201, the battery module 10 can fit tightly against the liquid cooling plate 40. Then, the top cover 202 is closed with the bottom shell 201 to complete the assembly of the battery pack 100. The assembly difficulty is relatively low.

[0060] Optionally, the battery pack 100 also includes a coolant supply pipe 61 and a coolant outlet pipe 62. The coolant supply pipe 61 is connected to multiple liquid cooling plates 40 and is used to supply coolant to the multiple liquid cooling plates 40. The coolant outlet pipe 62 is connected to the multiple liquid cooling plates 40 and is used to receive coolant discharged from the liquid cooling plates 40. In this way, by supplying coolant to multiple liquid cooling plates 40 through a single coolant supply pipe 61 and receiving coolant discharged from multiple liquid cooling plates 40 through a single coolant outlet pipe 62, the number of coolant supply pipes 61 and outlet pipes 62 can be reduced, thereby reducing the cost of the battery pack 100 and simplifying the structure of the battery pack 100, which is beneficial for the miniaturization design of the battery pack 100.

[0061] In some embodiments, such as Figure 6 As shown, the battery module 10 includes multiple battery cells 11, an end plate 12, and cable ties 13. The end plate 12 and the multiple battery cells 11 are stacked sequentially, and the end plate 12 is electrically connected to the multiple battery cells 11. The cable ties 13 surround the end plate 12 and the multiple battery cells 11. In this way, fixing the end plate 12 to the multiple battery cells 11 with the cable ties 13 can improve the overall structural strength of the battery module 10, and using the end plate 12 to electrically connect to the multiple battery cells 11 can simplify the circuit structure of the battery module 10.

[0062] In this embodiment, an adhesive layer can be provided between multiple battery cells 11 to fix the multiple battery cells 11. The adhesive layer can be double-sided tape, solid glue or glue, etc., and can be selected according to the actual situation. This embodiment does not make specific limitations on this.

[0063] Furthermore, the battery module 10 also includes an insulating cover 14, which is disposed between the end plate 12 and the battery cell 11. This can prevent short circuits between the battery cell 11 and the end plate 12 from causing damage to the battery module 10, thereby improving the yield rate of the battery assembly.

[0064] Embodiment 1 of the present invention provides a battery pack 100, which houses at least one battery module 10 through a housing. The battery module 10 includes multiple battery cells 11 arranged along a first direction x. A positioning protrusion 21 is provided for each battery module 10 by a housing 20, and two limiting grooves 22 are provided for each positioning protrusion 21, respectively located on both sides of the positioning protrusion 21 along a second direction y. At the same time, the limiting component 30 includes a first limiting pressure strip 31 and a second limiting pressure strip 32 arranged side by side along the second direction y. The first limiting pressure strip 31 is partially located between the battery module 10 and the positioning protrusion 21, and partially located in the limiting groove 22 on one side of the positioning protrusion 21. The second limiting pressure strip 32 is partially located between the battery module 10 and the positioning protrusion 21, and partially located in the limiting groove 22 on the other side of the positioning protrusion 21. In this way, the first limiting pressure strip 31 and the second limiting pressure strip 32 can fix the battery module 10 to the housing 20, and the fixing reliability of the battery module 10 in the housing 20 is high. Furthermore, during assembly, the battery module 10 and the corresponding limiting component 30 can be installed together into the housing 20. At this time, while the first limiting strip 31 and the second limiting strip 32 are assembled with the limiting groove 22 of the housing 20, the battery module 10 can be fixed at the positioning protrusion 21 of the housing 20, making the assembly of the battery module 10 relatively easy.

[0065] Example 2

[0066] Please see Figure 7 This is a simplified structural diagram of an energy storage device 200 provided in Embodiment 2 of the present invention. The energy storage device 200 includes the battery pack 100 of Embodiment 1.

[0067] The energy storage device 200 can be a household energy storage cabinet or an energy storage box in the form of a small container; this embodiment does not specifically limit this.

[0068] Optionally, the energy storage device 200 may include one or more battery packs 100. For example, in some embodiments, the number of battery packs 100 in the energy storage device 200 may be one, two, three, four, etc., and this embodiment does not specifically limit this.

[0069] Furthermore, when the energy storage device 200 includes multiple battery packs 100, the multiple battery packs 100 can be connected in series or in parallel, and this embodiment does not specifically limit this.

[0070] Embodiment 2 of the present invention provides an energy storage device 200, wherein the battery module 10 of the battery pack 100 has a low cost and a high cooling efficiency.

[0071] The present invention has provided a detailed description of a battery pack and energy storage device disclosed in the embodiments above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the battery pack and energy storage device of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery pack, characterized in that, include: At least one battery module, each of the battery modules comprising a plurality of battery cells arranged along a first direction; A housing for accommodating the battery modules, the housing having a positioning protrusion for each battery module, and two limiting grooves located on either side of each positioning protrusion along a second direction, the second direction being perpendicular to the first direction; and At least one limiting component, each of the limiting components including a first limiting pressure strip and a second limiting pressure strip arranged side by side along the second direction; The first limiting pressure strip is partially disposed between the battery module and the positioning protrusion, and the first limiting pressure strip is partially disposed in the limiting groove on one side of the positioning protrusion. The second limiting strip is partially disposed between the battery module and the positioning protrusion, and partially disposed in the limiting groove on the other side of the positioning protrusion. The first limiting strip and the second limiting strip are used to fix the battery module to the housing.

2. The battery pack according to claim 1, characterized in that, The first limiting strip includes: A first support portion is at least partially disposed between the battery module and the positioning protrusion; A first limiting portion, perpendicularly connected to the first supporting portion, extends upward from its connection point with the first supporting portion along the height direction of the battery module away from the limiting groove, and abuts against one side of the battery module along the second direction; and A first positioning part is connected to a first support part. The first positioning part extends downward from the connection point with the first support part along the height direction away from the first limiting part and engages with the limiting groove.

3. The battery pack according to claim 1 or 2, characterized in that, The second limiting strip includes: The second support portion is at least partially disposed between the battery module and the positioning protrusion; The second limiting part is perpendicularly connected to the second support part. The second limiting part extends upward from the connection point with the second support part along the height direction of the battery module away from the limiting groove, and abuts against the other side of the battery module along the second direction. The second positioning part is connected to the second support part. The second positioning part extends downward from the connection point with the second support part along the height direction away from the second limiting part and engages with the limiting groove.

4. The battery pack according to claim 1, characterized in that, The two sides of the positioning protrusion along the second direction are both inclined surfaces, and the inclined surfaces form an inclined angle with the bottom surface of the limiting groove.

5. The battery pack according to claim 4, characterized in that, The angle of inclination between the inclined surface and the bottom surface of the limiting groove is α, where 90° < α ≤ 150°.

6. The battery pack according to claim 1, characterized in that, The battery pack has multiple battery modules, which are arranged side by side at intervals along the second direction, and the limiting grooves between the two positioning protrusions corresponding to two adjacent battery modules are the same limiting groove.

7. The battery pack according to claim 6, characterized in that, The battery pack also includes at least one liquid cooling plate, which is disposed between the battery modules.

8. The battery pack according to claim 7, characterized in that, The distance between two adjacent battery modules along the second direction is equal to the thickness of the liquid cooling plate.

9. The battery pack according to claim 7, characterized in that, The battery pack also includes multiple thermal pads, which are provided on both sides of the liquid cooling plate and contact the battery module.

10. The battery pack according to claim 9, characterized in that, The distance between two adjacent battery modules along the second direction is equal to the sum of the thickness of the liquid cooling plate and the thickness of the two thermal pads on both sides of the liquid cooling plate.

11. An energy storage device, characterized in that, Includes the battery pack as described in any one of claims 1 to 10.

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