CN219998425U - Energy storage device - Google Patents

Abstract

The utility model discloses an energy storage device, which comprises: battery module and box. The two ends of the battery module are provided with first end plates; the battery module is arranged in the accommodating space, a limiting piece is arranged on the second end plate of the case, the first end plate is opposite to the second end plate, and the limiting piece is matched with the first end plate to limit the first end plate. Therefore, the limit can be carried out on the periphery of the battery module and the vertical direction of the battery module, so that the electrical connection stability of the energy storage device is ensured, and the safety of the energy storage device is further improved.

Description

Energy storage device

Technical Field

The utility model relates to the field of secondary batteries, in particular to an energy storage device.

Background

The energy storage device is used as an energy storage unit of electric equipment, has an indispensable effect, is generally formed by combining a plurality of groups of battery modules in the energy storage device, in some prior art, a side plate of a box body of the energy storage device can limit the battery modules placed inside, but the side plate can limit the periphery of the battery modules, and when the energy storage device is transported, shaking or jolting can occur, and the battery modules can displace in the vertical direction, so that the electric connection stability of the energy storage device is affected.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an energy storage device, which can limit the vertical direction of a battery module while limiting the peripheral side of the battery module, so as to ensure the electrical connection stability of the energy storage device and further improve the safety of the energy storage device.

According to an embodiment of the present utility model, an energy storage device includes: battery module and box. The two ends of the battery module are provided with first end plates; the battery module is arranged in the accommodating space, a limiting piece is arranged on the second end plate of the case, the first end plate is opposite to the second end plate, and the limiting piece is matched with the first end plate to limit the first end plate.

According to the energy storage device provided by the embodiment of the utility model, the battery module is arranged in the accommodating space of the box body, the limiting piece positioned on the second end plate can be matched with the first end plate so as to limit the battery module, shaking or jolting can possibly occur in the process of transporting or using the energy storage device, the second end plate of the box body can be matched with the first end plate of the battery module so as to limit the battery module at the periphery of the battery module, and the limiting piece can be pressed above the first end plate when limiting the first end plate, can also be clamped with the first end plate at the left side and the right side of the first end plate, so that the battery module is limited in multiple directions. Therefore, the limit can be carried out on the periphery of the battery module and the vertical direction of the battery module, so that the electrical connection stability of the energy storage device is ensured, and the safety of the energy storage device is further improved.

In some embodiments, the limiting member is located at an upper side edge of the second end plate, a lower surface of the limiting member is formed as a pressing surface, an upper surface of the limiting member is formed as a guiding surface, and a cross-section of the limiting member is semicircular, triangular or trapezoidal. Therefore, the mounting difficulty can be reduced while the mounting stability of the battery module is ensured.

In some embodiments, a transition surface is disposed between the pressing surface and the guiding surface, and the transition surface is an arc surface. Therefore, the safety of the battery module can be ensured when the energy storage device is assembled.

In some embodiments, the second end plate is provided with a relief hole, the limiting member is connected with the second end plate above the relief hole, and at least part of the limiting member is located within the outline range of the relief hole, so that the limiting member has elasticity. Therefore, the loading and unloading difficulty of the battery module in the box body can be reduced.

In some embodiments, the battery module includes: a plurality of single batteries and a heat dissipation plate. The heat dissipation plate is arranged between at least one pair of adjacent single batteries, and a heat dissipation channel is defined between the heat dissipation plate and the surfaces of the single batteries so as to realize heat dissipation between the adjacent single batteries. Therefore, the thermal runaway of the single battery can be avoided, and the safety of the battery module is ensured.

Further, a vent hole is formed in the side plate of the box body, and the vent hole is located at the downstream of the heat dissipation channel. Therefore, the heat dissipation of the single battery can be assisted, the heat concentration of the battery module is avoided, and the safety of the energy storage device is improved.

In some embodiments, the heat dissipating plate includes: the cooling device comprises a partition plate and air channel ribs positioned on two sides of the partition plate, wherein the air channel ribs, the partition plate and the surfaces of the single batteries define the cooling channel. Therefore, the ventilation area of the heat dissipation channel can be increased through the air channel ribs, and the heat dissipation efficiency of the battery module is improved.

Further, the air duct ribs are multiple, and the air duct ribs are arranged at intervals in the length direction or the width direction of the partition plate. Therefore, the air can be guided by the plurality of air duct ribs, and the heat dissipation efficiency of the battery module is further improved.

Optionally, the heat dissipation plate further includes: the reinforcing ribs are positioned on two sides of the partition board, the extending direction of the reinforcing ribs is orthogonal to the extending direction of the air duct ribs, and the protruding height of the reinforcing ribs is smaller than that of the air duct ribs. Therefore, the structural strength of the heat dissipation plate can be increased while the heat dissipation efficiency of the battery module is not affected, and the stability of the battery module is improved.

Further alternatively, the number of the reinforcing ribs is plural, and the plurality of reinforcing ribs are arranged at intervals in the extending direction of the air duct rib. Therefore, the structural strength of the heat dissipation plate can be further increased, and the stability of the battery module is improved.

In some embodiments, the separator is provided at both ends with a reinforcement portion for supporting the unit cells. Therefore, the support of the cooling plate to the single battery can be improved, and the stability of the battery module is further improved.

In some embodiments, the separator is further provided at an end thereof with a lap flange that is overlapped on a surface of the adjacent unit cell. Therefore, the assembly difficulty of the battery module can be reduced.

In some embodiments, the battery module further comprises: the ribbon, a plurality of battery cells are arranged in a row, and battery cell is listed as both ends of being provided with first end plate, the ribbon is used for fixing first end plate the heating panel and a plurality of battery cells. Therefore, the structural strength of the battery module can be improved, and the stability of the battery module is further improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic perspective view of a part of a structure of an energy storage device according to an embodiment of the present utility model.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a schematic perspective view of a battery module of an energy storage device according to an embodiment of the utility model.

Fig. 4 is a front view of a battery module of the energy storage device according to the embodiment of the present utility model.

Fig. 5 is a schematic perspective view of a heat dissipation plate of a battery module of an energy storage device according to an embodiment of the utility model.

Reference numerals:

an energy storage device 1,

A battery module 100,

A single battery 110,

Heat dissipating plate 120, partition 121, air duct rib 122, reinforcing rib 123, reinforcing portion 124, overlap flange 125,

A first end plate 130,

Ribbon 140,

A box body 200,

Side plates 210, ventilation holes 211,

A second end plate 220, a limiting piece 221 and a dodging hole 222.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

An energy storage device 1 according to an embodiment of the utility model is described below with reference to fig. 1-5.

As shown in fig. 1-2, an energy storage device 1 according to an embodiment of the present utility model, the energy storage device 1 includes: battery module 100 and case 200.

Wherein, the battery module 100 has first end plates 130 at both ends thereof; the case 200 has a second end plate 220 and a receiving space, the battery module 100 is disposed in the receiving space, a limiting member 221 is disposed on the second end plate 220 of the case 200, the first end plate 130 is opposite to the second end plate 220, and the limiting member 221 cooperates with the first end plate 130 to limit the first end plate 130.

Specifically, the battery module 100 is disposed in the accommodating space of the case 200, and the limiting member 221 disposed above the second end plate 220 may be engaged with the first end plate 130, so as to limit the battery module 100, and shake or jolt may occur during transportation or use of the energy storage device 1, and the second end plate 220 of the case 200 may be engaged with the first end plate 130 of the battery module 100, so that the battery module 100 is limited at the peripheral side thereof, and the limiting member 221 may be pressed against the upper side of the first end plate 130 when limiting the first end plate 130, or may be disposed at the left and right sides of the first end plate 130 and clamped with the first end plate 130, so as to limit the battery module 100 in multiple directions.

According to the energy storage device 1 provided by the embodiment of the utility model, the limit is performed on the peripheral side of the battery module 100 and the vertical direction of the battery module 100 at the same time, so that the electrical connection stability of the energy storage device 1 is ensured, and the safety of the energy storage device 100 is further improved.

It should be noted that, the limiting manner of the limiting member 221 to the first end plate 130 is not specifically limited, for example, the limiting member 221 may be pressed against the upper portion of the first end plate 130, after the battery module 100 is assembled in the case 200, the limiting member 221 presses against the upper portion of the first end plate 130, so that the battery module 100 may be limited in the vertical direction of the battery module 100, and the limiting member 221 may be further disposed on two sides of the second end plate 220 and formed into a snap-fit manner, so as to be snapped with the first end plate 130 on two sides of the first end plate 130, thereby limiting the battery module 100. Can be set according to actual needs.

In some embodiments, the stopper 221 is located at an upper edge of the second end plate 220, a lower surface of the stopper 221 is formed as a pressing surface, an upper surface of the stopper 221 is formed as a guide surface, and a cross-sectional shape of the stopper 221 is semicircular, triangular, or trapezoidal.

Specifically, when the battery module 100 is disposed in the case 200, the first end plate 130 of the battery module 100 is first contacted with the upper surface of the limiting member 221 located at the upper edge of the second end plate 220, and since the upper surface of the limiting member 221 is a guiding surface, the first end plate 130 can be guided, so that the battery module 100 is smoothly placed in the case 200, after the battery module 100 is mounted in place, the lower surface of the limiting member 221 can be contacted with the upper surface of the first end plate 130 of the battery module 100, and the lower surface of the limiting member 221 presses the battery module 100, so that the battery module 100 can be stably fixed in the case 200.

Thus, the mounting difficulty can be reduced while ensuring the mounting stability of the battery module 100.

The cross-sectional direction of the stopper 221 is a cross-section perpendicular to the extending direction of the stopper 221, and when the stopper 221 is disposed on the second end plate 220, the extending direction of the stopper 221 is the same as the length direction of the second end plate 220, and at this time, the cross-sectional direction of the stopper 221 is a cross-section perpendicular to the length direction of the second end plate 220.

It is to be understood that when the cross-sectional shape of the stopper 221 is a semicircle, a semicircular arc surface is formed as a guide surface, and a semicircular plane is a pressing surface. When the stopper 221 has a triangular cross-sectional shape, one of the triangular surfaces is connected to the second end plate 220, and the surface facing the upper side of the second end plate 220 in a direction away from the second end plate 220 extends obliquely downward to form a guide surface, and the surface facing the lower side of the second end plate 220 is a pressing surface. When the stopper 221 has a trapezoidal cross-sectional shape, the sloping side between the upper and lower bases of the trapezoid is formed as a guide surface, and the lower base of the trapezoid is formed as a pressing surface.

In some embodiments, a transition surface is provided between the pressing surface and the guiding surface, the transition surface being an arc surface.

Specifically, when the battery module 100 is placed in the case 200, the bottom of the first end plate 130 of the battery module 100 is first contacted with the guiding surface of the limiting member 221, the guiding surface guides the battery module 100, and during the process of placing the battery module 100, the sidewall of the first end plate 130 contacts with the transition surface between the pressing surface of the limiting member 221 and the guiding surface, and the pressing surface is in arc transition with the guiding surface, so as to prevent the limiting member 221 from scratching the sidewall of the first end plate 130.

Thereby, the safety of the battery module 100 can be ensured when the energy storage device 1 is assembled.

In some embodiments, as shown in fig. 2, the second end plate 220 has a relief hole 222, the limiting member 221 is connected to the second end plate 220 above the relief hole 222, and at least a portion of the limiting member 221 is located within the contour of the relief hole 222, so that the limiting member 221 has elasticity.

Specifically, when the battery module 100 is placed in the case 200, the limiting member 221 may enter the avoidance hole 222 under the pressing of the first end plate 130 of the battery module 100, so as to avoid the battery module 100, after the battery module 100 is installed in place, the limiting member 221 may pop out from the avoidance hole 222 under the action of self elasticity, and press against the first end plate 130. When the battery module 100 in the energy storage device 1 needs to be replaced, the limiting piece 221 can be manually pressed into the avoidance hole 222, so that the limiting piece 221 is disengaged from the first end plate 130, and the battery module 100 can be conveniently disassembled.

Thus, the difficulty in mounting and dismounting the battery module 100 in the case 200 can be reduced.

As shown in fig. 3 to 4, in some embodiments, the battery module 100 includes: a plurality of unit cells 110 and a heat dissipation plate 120. The heat dissipation plate 120 is at least one, and a heat dissipation plate 120 is disposed between at least one pair of adjacent unit cells 110, and a heat dissipation channel is defined between the heat dissipation plate 120 and the surface of the unit cell 110, so as to achieve heat dissipation between the adjacent unit cells 110.

Specifically, the heat dissipation plate 120 is disposed between two adjacent unit cells 110, and a heat dissipation channel is formed between the two adjacent unit cells 110 by the interval of the heat dissipation plate 120. When the battery module 100 performs charge and discharge, heat is generated inside the unit cells 110, and the heat can be diffused outwards from the surfaces of the unit cells 110, and the heat dissipation plate 120 can enable a heat dissipation channel to be arranged between two adjacent unit cells 110, so that the heat can be discharged from the heat dissipation channel, and the unit cells 110 can be kept at a lower temperature.

Therefore, the battery module 100 can have more stable performance in the use process, the heat of the battery module 100 can be discharged in time, the thermal runaway of the single battery 110 can be avoided, and the safety of the battery module 100 is improved.

It should be noted that, the number of the heat dissipation plates 120 is not particularly limited, and when a plurality of unit batteries 110 are arranged in the battery module 100, the heat dissipation plates 120 may be disposed between every two unit batteries 110, and the heat dissipation capability of the battery module 100 may be improved, thereby improving the safety.

As shown in fig. 1, in some embodiments, a vent hole 211 is formed in a side plate 210 of the case 200, and the vent hole 211 is located downstream of the heat dissipation channel. The air in the heat dissipation path may flow to the outside of the energy storage device 1 through the vent holes 211 on the side plates 210 of the case 200, so that the battery module 100 maintains a low temperature. Therefore, the heat dissipation of the single battery 110 can be assisted, the heat concentration of the battery module 100 can be avoided, and the safety of the energy storage device 1 can be improved.

It should be noted that, the downstream of the heat dissipation channel is in a direction close to the outlet of the heat dissipation channel, when the unit battery 110 generates heat in the use process, the heat is concentrated inside the unit battery 110, the heat inside the unit battery 110 can be discharged through the heat dissipation plate 120 located between two adjacent unit batteries 110, and the heat dissipation channel is defined between the heat dissipation plate 120 and the unit battery 110, at this time, the middle position close to the heat dissipation plate 120 is the upstream of the heat dissipation channel, and the edge position close to the heat dissipation plate 120 is the downstream of the heat dissipation channel, that is, the outlet of the heat dissipation channel is the downstream of the heat dissipation channel, and the vent 211 is arranged at the downstream of the heat dissipation channel, so as to improve the heat dissipation effect of the case 200 on the battery module 100.

As shown in fig. 4-5, in some embodiments, the heat dissipating plate 120 includes: the partition plate 121 and the air duct ribs 122 positioned at both sides of the partition plate 121, and the surfaces of the air duct ribs 122, the partition plate 121 and the unit cells 110 define a heat dissipation path.

Specifically, the air duct ribs 122 are protruding ribs disposed at two sides of the partition 121, so that the partition 121 is spaced apart from the unit cells 110 at two sides, and the section of the heat dissipation channel is further increased, and when the unit cells 110 generate large heat, the heat can be dissipated from the heat dissipation channel in time, and the unit cells 110 keep a low temperature.

Therefore, the ventilation area of the heat dissipation channel can be increased through the air channel ribs 122, and the heat dissipation efficiency of the battery module 100 is improved.

It should be noted that, the connection mode of the air duct rib 122 and the partition plate 121 is not limited, the air duct rib 122 and the partition plate 121 may be fixedly connected by bonding, welding or integrally forming, or may be detachably connected by clamping or inserting, and may be selected according to actual needs.

As shown in fig. 3 to 5, the plurality of air duct ribs 122 are further provided, and the plurality of air duct ribs 122 are arranged at intervals in the longitudinal direction or the width direction of the partition 121.

Specifically, the heat dissipation plate 120 is disposed between two adjacent unit cells 110, the unit cells 110 have a first direction and a second direction, the first direction is perpendicular to the second direction, the length direction of the unit cells 110 is the first direction, the width direction of the unit cells 110 is the second direction, the length direction of the partition 121 is parallel to the length direction of the unit cells 110, and the width direction of the partition 121 is parallel to the width direction of the unit cells 110. When the plurality of air duct ribs 122 are disposed at intervals in the length direction of the partition plate 121, the heat dissipation plate 120 and the surface of the unit cell 110 define a plurality of heat dissipation channels in the length direction of the unit cell 110, and heat generated by the unit cell 110 is dissipated into the heat dissipation channels through the surface of the unit cell 110, and the heat dissipation channels extending along the length direction of the unit cell 110 can guide hot air to make the air circulate rapidly. When the plurality of air duct ribs 122 are disposed at intervals in the width direction of the partition plate 121, the heat dissipation plate 120 and the surface of the unit cell 110 define a plurality of heat dissipation channels in the width direction of the unit cell 110, and heat generated by the unit cell 110 is dissipated into the heat dissipation channels through the surface of the unit cell 110, and the heat dissipation channels extending along the width direction of the unit cell 110 can also guide hot air to make the air circulate rapidly.

Therefore, the air duct ribs 122 can guide air, and further improve the heat dissipation efficiency of the battery module 100.

Optionally, the battery module 100 further includes a plurality of heat dissipation fans disposed at the outlet of the heat dissipation channel. When the battery module 100 charges and discharges to generate heat from the single battery 110, the cooling fan can be controlled to operate, and the cooling fan can drive air in the cooling channel to flow rapidly, so that the battery module 100 has higher cooling efficiency, and the safety of the battery module 100 is improved.

As shown in fig. 5, optionally, the heat dissipation plate 120 further includes: the reinforcing ribs 123, the reinforcing ribs 123 are located on two sides of the partition board, the extending direction of the reinforcing ribs 123 is orthogonal to the extending direction of the air duct ribs 122, and the protruding height of the reinforcing ribs 123 is smaller than that of the air duct ribs 122.

Specifically, the heat dissipation plate 120 is disposed in two adjacent unit cells 110, so that the heat dissipation efficiency of the unit cells 110 can be increased, the support can be provided for two adjacent unit cells 110, the structural strength of the heat dissipation plate 120 can be improved by disposing the reinforcing ribs 123 on the heat dissipation plate 120, the collision between the unit cells 110 is avoided in the transportation process of the battery module 100, the service life of the battery module 100 is ensured, and the protruding height of the reinforcing ribs 123 is smaller than that of the air duct ribs 122, so that the reinforcing ribs 123 can not block the air flow when the air flows in the heat dissipation channel, and the battery module 100 can be ensured to have higher heat dissipation efficiency.

Therefore, the structural strength of the heat dissipation plate 120 can be increased without affecting the heat dissipation efficiency of the battery module 100, and the stability of the battery module 100 can be improved.

It should be noted that, when the extending direction of the air duct rib 122 is parallel to the length direction of the partition plate 121, that is, when the extending direction of the air duct rib 122 is the first direction, the extending direction of the reinforcing rib 123 is the second direction, and when the extending direction of the air duct rib 122 is parallel to the width direction of the partition plate 121, that is, when the extending direction of the air duct rib 122 is the second direction, the extending direction of the reinforcing rib 123 is the first direction.

Further alternatively, the plurality of reinforcing ribs 123 are provided in plurality, and the plurality of reinforcing ribs 123 are disposed at intervals in the extending direction of the air duct rib 122.

Specifically, when the air duct ribs 122 are disposed at intervals in the longitudinal direction of the partition plate 121, the plurality of reinforcing ribs 123 are disposed at intervals in the width direction of the partition plate 121, and when the air duct ribs 122 are disposed at intervals in the width direction of the partition plate 121, the plurality of reinforcing ribs 123 are disposed at intervals in the longitudinal direction of the partition plate 121, so that a mesh structure can be formed between the plurality of air duct ribs 122 and the plurality of reinforcing ribs 123.

Thus, the structural strength of the heat dissipation plate 120 may be further increased, and the stability of the battery module 100 may be improved.

As shown in fig. 5, in some embodiments, both ends of the separator 121 are provided with reinforcing parts 124, and the reinforcing parts 124 serve to support the unit cells 110.

Specifically, after the assembly of the battery module 100 is completed, the heat dissipation plates 120 are arranged between two adjacent single batteries 110, and during the transportation or use process of the battery module 100, the battery module 100 can shake, so that the single batteries 110 are mutually extruded and collided, the heat dissipation plates 120 are arranged between the single batteries 110, the single batteries 110 can be prevented from being collided, but the two ends of the heat dissipation plates 120 are relatively large in impact and are easy to damage, the reinforcing parts 124 are arranged at the two ends of the partition plate 121, the structural strength of the two ends of the heat dissipation plates 120 can be improved, and the heat dissipation plates 120 are prevented from being damaged when the single batteries 110 are extruded and collide with the heat dissipation plates 120.

This can improve the support of the heat dissipation plate 120 to the unit cells 110, and further improve the stability of the battery module 100.

The materials used for the air duct rib 122, the partition plate 121, and the reinforcement portion 124 are not particularly limited, and may be, for example, plastic or nylon having a certain elasticity, and may be selected according to actual needs.

Optionally, the heat dissipation plate 120 is made of an insulating material. By arranging the heat dissipation plates 120 made of insulating materials between the single batteries 110, the insulativity between the single batteries 110 can be ensured, short circuit between the single batteries 110 is prevented, and the safety of the battery module 100 is further improved.

As shown in fig. 3-5, in some embodiments, the end of the separator 121 is further provided with a lap flange 125, and the lap flange 125 is overlapped on the surface of the adjacent unit cell 110.

Specifically, when the battery module 100 is assembled, one side of the heat dissipation plate 120 is close to the surface of the battery cell 110, the lap joint flange 125 on the one side is lap-jointed to the surface of the battery cell 110, and then the surface of the other battery cell 110 is close to the other side of the heat dissipation plate 120, so that the surface of the battery cell 110 is lap-jointed under the lap joint flange 125 on the other side, and the installation of the battery module 100 can be completed by such pushing. Thus, the difficulty in assembling the battery module 100 can be reduced.

It is understood that the number of the overlapping flanges 125 may be two, and the two overlapping flanges 125 are respectively disposed at two ends of the partition plate 121, so that when the heat dissipation plate 120 is disposed between the two unit batteries 110, the overlapping flanges 125 disposed at two ends of the partition plate 121 may clamp the surfaces of the unit batteries 110, thereby fixing the unit batteries 110.

As shown in fig. 4 to 5, in some embodiments, the battery module 100 further includes: the ribbon 140, the plurality of single cells 110 are arranged in a row, and the first end plates 130 are disposed at two ends of the row of single cells 110, and the ribbon 140 is used for fixing the first end plates 130, the heat dissipation plate 120, and the plurality of single cells 110. The first end plates 130 are disposed at both ends of the battery module 100 to protect the unit cells 110 in the battery module 100, and when they are fixed by the bands 140, the battery module 100 is formed as a unit. Therefore, the structural strength of the battery module 100 can be improved, and the stability of the battery module 100 can be further improved.

In some embodiments, the energy storage device 1 may be a battery pack or a battery box, and multiple sets of battery modules 100 may be disposed in the battery pack or the battery box to achieve intensive arrangement.

In the scheme of the utility model, the energy storage device 1 can be arranged in electric equipment, the structure of the electric equipment is not limited, for example, the electric equipment can be mobile equipment such as vehicles, ships, small aircrafts and the like, and the power source comprises the energy storage device 1. The electric energy provided by the energy storage device 1 provides driving force for electric equipment. The mobile device can be pure electric device, namely the driving force of electric equipment is electric energy, and the power source only comprises the energy storage device 1. The mobile device can also be a hybrid power device, and the power source comprises an energy storage device 1, an engine and other power devices.

For another example, the energy storage device 1 may be an energy storage device such as an energy storage cabinet, and may be used as a charging cabinet of a mobile device or as an energy storage device of other devices. For example, the solar power generation equipment can be provided with an energy storage cabinet, and electric energy generated by solar power generation is temporarily stored in the energy storage cabinet so as to be used for devices such as street lamps and bus stop boards.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. The "first feature" and "second feature" may include one or more of the features. The meaning of "plurality" is two or more. A first feature "above" or "below" a second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. The first feature being "above," "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. An energy storage device, comprising:

a battery module (100), wherein both ends of the battery module (100) are provided with first end plates (130);

the battery module (100) is arranged in the accommodating space, a limiting piece (221) is arranged on the second end plate (220) of the case body, the first end plate (130) is opposite to the second end plate (220), and the limiting piece (221) is matched with the first end plate (130) to limit the first end plate (130).

2. The energy storage device according to claim 1, wherein the stopper (221) is located at an upper side edge of the second end plate (220), a lower surface of the stopper (221) is formed as a pressing surface, an upper surface of the stopper (221) is formed as a guide surface, and a cross-sectional shape of the stopper (221) is semicircular, triangular, or trapezoidal.

3. The energy storage device of claim 2, wherein a transition surface is disposed between the pressing surface and the guiding surface, and the transition surface is an arc surface.

4. The energy storage device according to claim 1, wherein the second end plate (220) has a relief hole (222), the limiting member (221) is connected to the second end plate (220) above the relief hole (222), and at least a portion of the limiting member (221) is located within the contour of the relief hole (222), so that the limiting member (221) has elasticity.

5. The energy storage device according to claim 1, wherein the battery module (100) comprises:

a plurality of single cells (110);

and a heat dissipation plate (120), wherein the heat dissipation plate (120) is arranged between at least one pair of adjacent single batteries (110), and a heat dissipation channel is defined between the heat dissipation plate (120) and the surface of the single battery (110) so as to realize heat dissipation between the adjacent single batteries (110).

6. The energy storage device according to claim 5, wherein a vent hole (211) is provided in a side plate (210) of the case (200), and the vent hole (211) is located downstream of the heat dissipation channel.

7. The energy storage device of claim 5, wherein the heat dissipating plate (120) comprises: the cooling device comprises a partition plate (121) and air channel ribs (122) arranged on two sides of the partition plate (121), wherein the surfaces of the air channel ribs (122), the partition plate (121) and the single battery (110) define the cooling channel.

8. The energy storage device according to claim 7, wherein the plurality of air channel ribs (122) are provided, and the plurality of air channel ribs (122) are provided at intervals in a longitudinal direction or a width direction of the partition plate (121).

9. The energy storage device of claim 8, wherein the heat dissipating plate (120) further comprises: reinforcing ribs (123), the reinforcing ribs (123) are located on two sides of the partition plate (121), the extending direction of the reinforcing ribs (123) is orthogonal to the extending direction of the air duct ribs (122), and the protruding height of the reinforcing ribs (123) is smaller than that of the air duct ribs (122).

10. The energy storage device according to claim 9, wherein the plurality of reinforcing ribs (123) are provided, and the plurality of reinforcing ribs (123) are disposed at intervals in the extending direction of the air duct rib (122).

11. The energy storage device according to claim 7, wherein both ends of the separator (121) are provided with reinforcing portions (124), the reinforcing portions (124) being for supporting the unit cells (110).

12. The energy storage device according to claim 7, wherein the end of the separator (121) is further provided with a lap flange (125), the lap flange (125) being overlapped on the surface of the adjacent unit cell (110).

13. The energy storage device of claim 5, wherein the battery module further comprises: the ribbon (140), a plurality of battery cells (110) are arranged in a row, and the first end plate (130) is arranged at two ends of the battery cell (110) row, and the ribbon (140) is used for fixing the first end plate (130), the heat dissipation plate (120) and a plurality of battery cells (110).