Battery module and energy storage device

Abstract

The utility model discloses a battery module and an energy storage device. The battery module comprises a shell and a battery cell group; the shell comprises a bottom plate, the bottom plate is provided with a limiting groove, the limiting groove comprises an inner top wall surface and two inner side wall surfaces which are oppositely arranged, at least one part of the inner side wall surfaces is provided with a bulge which protrudes laterally so as to form an opening part, and the limiting groove is used for being in sliding connection with the bulge part of the cold plate assembly or the heat transfer part; the battery cell group is positioned in the shell, and the bottom end of the battery cell group is contacted with a bottom plate of the shell. Therefore, the bottom end of the battery cell group is in contact with the bottom plate of the shell, the bottom plate is in contact with the cold plate assembly, or indirect heat transfer is performed through the heat transfer piece and the cold plate assembly, so that the cold plate assembly can effectively cool the battery cell group; besides, through the arrangement of a limiting groove, the limiting groove is in sliding connection with the cold plate assembly or the heat transfer piece, and when the cold plate assembly goes wrong, the cold plate assembly can be independently disassembled and replaced; the battery module space occupied by the cold plate assembly can be reduced, and the energy density of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the field of energy storage devices, in particular to a battery module. Background Art

[0002] There are two main ways to dissipate heat in traditional battery modules.

[0003] The first is air cooling, which uses a fan designed inside the battery box to create forced convection to remove heat from the surface of the battery module. The air cooling method is not ideal for the rapid temperature rise caused by high current charging and discharging of users.

[0004] The second method is to set up a liquid cooling channel inside the module to remove the heat generated by the module through circulation.

[0005] In the above two heat dissipation methods, the relevant heat dissipation device (for example, the fan of the first method and the liquid cooling heat dissipation channel of the second method) is integrated with the battery box. In this way, when there is a problem with the heat dissipation device, the entire battery module needs to be replaced, which has a high replacement cost and low economic benefits. On the other hand, the heat dissipation device occupies the space of the battery box to a certain extent, and the energy density of the battery module is low.

[0006] To this end, the utility model provides a battery module and an energy storage device to at least partially solve the above problems. Utility Model Content

[0007] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the specific embodiments section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0008] In order to at least partially solve the above technical problems, the utility model provides a battery module, the battery module is used for an energy storage device, and the battery module includes:

[0009] The housing comprises a bottom plate, the bottom plate has a limiting groove, the limiting groove comprises an inner top wall surface and two inner side wall surfaces arranged opposite to each other, a convexity protruding laterally is arranged on at least a part of the inner side wall surface to form an opening, and the limiting groove is used to be slidably connected with the convex portion of the cold plate assembly or the heat transfer element so that the bottom plate contacts the cold plate assembly or the heat transfer element and is limited;

[0010] The battery cell group is located in the shell, and the bottom end of the battery cell group is in contact with the bottom plate of the shell.

[0011] According to the battery module of the utility model, the bottom end of the battery cell group contacts the bottom plate of the shell, and the bottom plate contacts the cold plate assembly, or indirectly transfers heat through the heat transfer element and the cold plate assembly, so that the cold plate assembly can effectively cool the battery cell group; in addition, through the setting of the limiting groove, the limiting groove is slidably connected with the cold plate assembly or the heat transfer element, so that the battery module can be conveniently installed on the energy storage device, and the limitation in the horizontal direction is realized, and the limitation in the vertical direction is realized through the protrusion; and the battery module is separately arranged from the cold plate assembly used for heat dissipation and cooling, and when the cold plate assembly has problems, the cold plate assembly can be disassembled and replaced separately; the space occupied by the cold plate assembly in the battery module can be reduced, and the energy density of the battery module can be improved.

[0012] Optionally, along the length direction of the shell, the limiting groove extends to the end of the bottom plate and forms an open end, and the shell is provided with a blocking portion for closing the open end.

[0013] Optionally, the inner wall surface has a straight section extending inward from the opening end, and a first guiding inclined surface is provided between the straight section and the protrusion, and the first guiding inclined surface is inclined to the length direction of the limiting groove.

[0014] Optionally, the housing is made of aluminum alloy.

[0015] Optionally, there are at least two battery cell groups, each of which includes at least two battery cells.

[0016] The battery module also includes a fixing member, which is sleeved on the outer periphery of at least two battery cells of the battery cell group to bind the at least two battery cells, and / or

[0017] The battery module also includes a fixing plate, which is connected to the shell and is located on the side of the battery cell group along the length direction of the shell, and the battery cell group is attached to the fixing plate.

[0018] Optionally, the housing further includes a top plate, the battery module further includes a battery bakelite board and thermally conductive silicone, the battery bakelite board is located between the battery cell group and the top plate, the thermally conductive silicone is penetrated through the battery bakelite board and connected to the electrodes of the battery cell group and the top plate, and / or

[0019] The battery module also includes an access door connected to the housing.

[0020] Optionally, the shell is provided with a positive connection connector, a negative connection connector and a fire protection connector, the positive connection connector is connected to the positive pole of the battery cell group, the negative connection connector is connected to the negative pole of the battery cell group, and the fire protection connector extends to the interior of the shell.

[0021] Optionally, the battery module further comprises a first copper bar and a second copper bar, wherein the first copper bar is connected to the positive electrode and the positive electrode connection connector of the battery cell group, and the second copper bar is connected to the negative electrode and the negative electrode connection connector of the battery cell group.

[0022] The first copper bar extends along the length direction of the shell, and part of the second copper bar extends along the vertical direction.

[0023] Optionally, the second copper bar includes a first copper bar portion and a second copper bar portion, the first copper bar portion extends in a vertical direction, the second copper bar portion extends in a length direction of the shell, the first copper bar portion is connected to the positive electrode of the battery cell group and the second copper bar portion, and the second copper bar portion is connected to the negative electrode connection connector.

[0024] The battery module also includes a protection plate, which is connected to the housing and is located between the second copper bar portion and the battery cell group, and the second copper bar portion is fixedly connected to the protection plate.

[0025] Optionally, the battery module further includes a battery controller and a battery sensor, and the housing is provided with a control connector.

[0026] The battery controller is electrically connected to the control connector, the battery cell group and the battery sensor. The battery controller is used to collect the battery temperature signal representing the temperature of the battery cell group through the battery sensor. The control connector is used to electrically connect other components outside the battery module so that the controller can communicate with other components outside the battery module through the control connector.

[0027] Optionally, the battery controller is located within the housing, or

[0028] A battery controller is coupled to the housing and is at least partially located outside the housing.

[0029] Optionally, the battery module further includes a battery explosion-proof valve arranged on the outer shell.

[0030] Optionally, the housing comprises a first end plate and a top plate, the upper end of the first end plate extends and protrudes above the top plate, the top plate abuts against the first end plate, and / or

[0031] The battery module further includes an operating handle pivotally connected to the outer side surface of the first end plate.

[0032] The utility model also provides an energy storage device, which includes:

[0033] The aforementioned battery module;

[0034] Heat transfer parts;

[0035] The heat transfer element is arranged between the battery module and the cold plate assembly, and a raised limiting portion is arranged on the heat transfer element, the limiting portion is slidably connected with the limiting groove, and the heat transfer element and the cold plate assembly are contact-connected or integrally formed.

[0036] According to the energy storage device of the utility model, the energy storage device includes the aforementioned battery module, the bottom end of the battery cell group contacts the bottom plate of the shell, the bottom plate contacts the cold plate assembly, or indirectly transfers heat with the cold plate assembly through the heat transfer element, so that the cold plate assembly can effectively cool the battery cell group; in addition, through the setting of the limiting groove, the limiting groove is slidably connected with the cold plate assembly or the heat transfer element, so that the battery module can be conveniently installed on the energy storage device, and the limiting in the horizontal direction is realized, and the limiting in the vertical direction is realized through the protrusion; and the battery module is separately arranged from the cold plate assembly used for heat dissipation and cooling, when the cold plate assembly has problems, the cold plate assembly can be disassembled and replaced separately; the space occupied by the cold plate assembly in the battery module can be reduced, and the energy density of the battery module can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the advantages of the utility model more easily understood, the utility model briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the utility model and should not be considered as limiting the scope of protection thereof. The utility model is described and explained with additional characteristics and details through the accompanying drawings.

[0038] Figure 1 It is a three-dimensional schematic diagram of an energy storage device according to a first preferred embodiment of the utility model;

[0039] Figure 2 for Figure 1 Another three-dimensional schematic diagram of the energy storage device box and the cold plate assembly are connected together, wherein the wall panel is not shown;

[0040] Figure 3 for Figure 1 A three-dimensional schematic diagram of a box body, a cold plate assembly and a battery module of an energy storage device connected together, wherein the wall panel is not shown;

[0041] Figure 4 for Figure 3 A three-dimensional schematic diagram of a battery module of an energy storage device;

[0042] Figure 5 for Figure 4 Another three-dimensional schematic diagram of a battery module of an energy storage device;

[0043] Figure 6 for Figure 4 A three-dimensional schematic diagram of a battery module of an energy storage device, wherein a side plate, a top plate and a second end plate are not shown;

[0044] Figure 7 for Figure 6 Another three-dimensional schematic diagram of a battery module of an energy storage device, wherein a side plate, a top plate, a second end plate and a heat transfer member are not shown;

[0045] Figure 8 for Figure 4 A three-dimensional schematic diagram of a heat transfer component of a battery module of an energy storage device;

[0046] Fig. 9 for Figure 7 A local enlarged schematic diagram of point C;

[0047] Fig.10 for Figure 8 A local enlarged schematic diagram of point D;

[0048] Fig.11 for Figure 4 An exploded schematic diagram of a battery module of an energy storage device;

[0049] as well as

[0050] Fig.12 It is a three-dimensional schematic diagram of a battery module of an energy storage device according to a second preferred embodiment of the utility model.

[0051] Description of Reference Numerals

[0052] 100: box body; 103: bracket; 132: silica gel mounting hole; 141: heat exchange plate; 160: shell; 161: bottom plate; 162: side plate; 163: first end plate; 164: second end plate; 165: limit groove; 166: inner top wall surface; 167: opening; 168: first guide slope; 169: end plate opening; 170: battery cell group; 171: first copper busbar; 173: second copper busbar; 174: battery controller; 175: positive electrode connection connector; 176: negative electrode connection connector; 177: Fire connector; 178: control connector; 179: battery explosion-proof valve; 180: inspection door; 181: battery bakelite; 182: thermal conductive silicone; 183: operating handle; 184: fixing plate; 185: heat transfer element; 186: limiting part; 187: fixing element; 188: first copper bar part; 189: second copper bar part; 190: top plate; 191: second guide slope; 200: battery controller; 201: outer shell; 202: inner wall; 203: protrusion; 204: straight section; 205: protection plate. DETAILED DESCRIPTION

[0053] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are only for the purpose of illustration and are not intended to be limiting.

[0055] In this document, ordinal numbers such as “first” and “second” cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order.

[0056] In order to thoroughly understand the implementation of the utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the utility model is described in detail below, but in addition to these detailed descriptions, the utility model can also have other implementations.

[0057] The utility model provides a battery module. The battery module can be used for an energy storage device. When in use, the energy storage device is fixedly arranged at a preset position to provide electrical energy. It can be understood that in an embodiment not shown, the energy storage device can also be an energy storage container. The bottom end of the battery cell of the battery module of the energy storage device contacts the bottom plate 161 of the battery module housing 160. The bottom plate 161 of the housing 160 contacts the cold plate assembly. In this way, the temperature of the battery cell can be effectively adjusted.

[0058] Please refer to Figures 1 to 12 The energy storage device includes a box 100. The box 100 is a substantially rectangular parallelepiped structure. Herein, the width direction of the box 100 is a first direction D1. The length direction of the box 100 is a second direction D2.

[0059] It can be understood that in an embodiment not shown, the length direction of the box body is the first direction D1, and the width direction of the box body is the second direction D2.

[0060] like Figure 2 and Figure 3 As shown, the energy storage device also includes a direct cooling system. The direct cooling system includes a battery rack located in the box 100. The battery rack includes a frame and a cold plate assembly. The battery rack also includes a bracket 103. The bracket 103 is used to support the cold plate assembly.

[0061] Please refer to Figure 2 and Figure 3 The cold plate assembly is located in the box 100. The cold plate assembly is used to support and contact the battery module to be connected later, so as to adjust the temperature of the battery module. The cold plate assembly includes a heat exchange plate 141. The heat exchange plate 141 is a plate. The heat exchange plate 141 is overlapped to the bracket 103. The length direction of the heat exchange plate 141 is parallel to the first direction D1.

[0062] The heat exchange plate 141 has a channel, and the channel is used to be connected to the refrigeration unit to form a refrigerant circulation loop with the refrigeration unit, so that the battery cell can be cooled through the heat exchange plate 141 and the housing 160.

[0063] Please refer to Figures 3 to 12 The battery rack also includes a battery module. The battery module is located in the box 100. The wall surface of the battery module contacts the cold plate assembly. For example, the battery module is placed on the cold plate assembly so that the cold plate assembly supports the battery module. At this time, the lower surface of the battery module is attached to the cold plate assembly through the heat transfer member 185 described later. In this way, the cold plate assembly can more effectively adjust the temperature of the battery module.

[0064] Preferably, if Figures 4 to 12 As shown, the battery module includes an outer shell 160. The outer shell 160 includes a bottom plate 161, a side plate 162, an end plate and a top plate 190. The outer surface of the bottom plate 161, the outer surface of the side plate 162, the outer surface of the end plate and the outer surface of the top plate 190 constitute the wall surface of the outer shell 160. The bottom plate 161, the side plate 162, the end plate and the top plate 190 form a roughly rectangular structure. When the battery module is arranged in the box 100, the length direction of the battery module is parallel to the second direction D2. That is to say, when the cold plate assembly and the battery module are arranged in the box 100, the length direction of the heat exchange plate 141 and the length direction of the outer shell 160 form an angle (for example, vertical). As a result, the weight of each battery module is borne by multiple heat exchange plates, thereby improving the load-bearing stability and strength.

[0065] In an embodiment not shown, the cold plate assembly may also be attached to at least one of the side plates, the end plates and the top plate.

[0066] like Fig. 9 and Fig.10 As shown, the lower surface of the bottom plate 161 forms a limiting groove 165. The limiting groove 165 includes an inner top wall surface 166 and two inner side wall surfaces 202. The plane where the inner top wall surface 166 is located is perpendicular to the vertical direction. The plane where the inner side wall surface 202 is located is perpendicular to the first direction D1. At least a portion of the inner side wall surface 202 is provided with a protrusion 203. Along the first direction D1, the protrusions 203 of the two inner side wall surfaces 202 protrude toward each other. In this way, the protrusions 203 constitute the opening portion 167.

[0067] In this way, the inner top wall surface 166 extends to the side of the protrusion 203 in the horizontal direction. The lower end of the opening portion 167 forms a downward opening. The limiting groove 165 is used to slide and connect to the heat transfer member 185, and then connect the cold plate assembly (to be described later) through the heat transfer member 185. In this way, the bottom plate 161 contacts the heat transfer member 185. Specifically, the inner top wall surface 166 can contact the heat transfer member 185. The portion of the lower surface of the bottom plate 161 outside the limiting groove 165 can contact the heat transfer member 185. At this time, the cold plate assembly can effectively adjust the temperature of the battery module.

[0068] like Figure 6 , Figure 7 and Fig.11 As shown, the battery module also includes a battery cell group 170. The battery cell group 170 is used to provide electrical energy to the energy storage device. The battery cell group 170 is located in the housing 160. In this way, the housing 160 can protect the battery cell group 170. The bottom end of the battery cell group 170 is overlapped to the upper surface of the bottom plate 161. In this way, the bottom plate 161 supports the battery cell group 170. In addition, the battery cell group 170 is directly in contact with the bottom plate 161. The bottom plate 161 is in contact with the cold plate assembly through the heat transfer member 185. The heat of the battery cell group 170 can be directly transferred to the bottom plate 161, and then transferred to the cold plate assembly through the heat transfer member 185 described later. In this way, the temperature of the battery cell group 170 can be more effectively adjusted.

[0069] In the present embodiment, the bottom end of the battery cell group contacts the bottom plate of the outer shell, and the bottom plate contacts the cold plate assembly, or indirectly transfers heat through the heat transfer element and the cold plate assembly, so that the cold plate assembly can effectively cool the battery cell group; in addition, through the setting of the limit groove, the limit groove is slidably connected with the cold plate assembly or the heat transfer element, so that the battery module can be conveniently installed on the energy storage device, and the limit in the horizontal direction is realized, and the limit in the vertical direction is realized through the protrusion; and the battery module is separately arranged from the cold plate assembly used for heat dissipation and cooling. When there is a problem with the cold plate assembly, the cold plate assembly can be disassembled and replaced separately without replacing the battery module; the space occupied by the cold plate assembly in the battery module can be reduced, and the energy density of the battery module can be improved.

[0070] Preferably, if Figures 7 to 9 As shown, along the length direction of the housing 160, the limiting groove 165 penetrates the bottom plate 161 to form an open end at the end of the bottom plate 161. Thus, the processing of the limiting groove 165 is convenient. In addition, the weight of the bottom plate 161 is small.

[0071] like Figure 5As shown, the end plate is located on the side of the bottom plate 161 along the length direction of the shell 160, and is connected to the bottom plate 161. The end plate extends to the lower surface of the bottom plate 161. The end plate includes a first end plate 163 and a second end plate 164. Along the length direction of the shell 160, the first end plate 163 is located at one end of the shell 160, and the second end plate 164 is located at the other end of the shell 160. The lower end of the second end plate 164 has an end plate opening 169. The end plate opening 169 is connected to the open end. As a result, the limiting portion 186 of the heat transfer member 185 described later can be installed in the limiting groove 165 through the end plate opening 169, which facilitates the connection of the bottom plate 161 to the heat transfer member 185 described later, so that the battery module can be conveniently installed to the energy storage device.

[0072] Preferably, the lower end of the first end plate 163 (an example of a blocking portion) blocks the end (open end) of the limiting groove 165 away from the second end plate 164. Thus, the strength of the housing 160 is large. In addition, the blocking portion can block the limiting portion 186 described later, thereby limiting the relative position between the housing 160 and the heat transfer member 185.

[0073] Preferably, if Fig. 9 As shown, the inner wall surface 202 also includes a straight section 204 and a transition mounting portion. The plane where the straight section 204 is located is perpendicular to the first direction D1. Along the length direction of the shell 160, the straight section 204 is located on the side of the transition mounting portion away from the blocking portion. The transition mounting portion has a first guide slope 168. The first guide slope 168 is inclined to the length direction of the shell 160 (that is, the length direction of the limiting groove 165). The limiting portion 186 described later has a second guide slope 191 corresponding to the first guide slope 168. In the process of connecting the bottom plate 161 to the heat transfer member 185, the first guide slope 168 and the second guide slope 191 are parallel. In this way, in the process of installing the bottom plate 161 to the heat transfer member 185, the first guide slope 168 and the second guide slope 191 cooperate to guide the movement of the limiting portion 186 into the limiting groove 165. As a result, it is convenient for the bottom plate 161 to be connected to the heat transfer member 185 described later.

[0074] Furthermore, the limiting groove 165 is configured as a T-shaped groove or a dovetail groove. Thus, the structure of the bottom plate 161 is simple.

[0075] Preferably, if Figure 6 and Figure 7 As shown, there are at least two battery cell groups 170. Each battery cell group 170 includes at least two battery cells. Thus, the battery module can store more electricity.

[0076] Please continue to refer to Figure 6 and Figure 7The battery module further includes a fixing member 187 (e.g., a steel belt). The fixing member 187 is sleeved on the outer periphery of at least two cells of each cell group 170 to bind the at least two cells. Thus, the connection between the at least two cells of the cell group 170 is firm. In addition, the at least two cells of the cell group 170 are connected by the fixing member 187, and the connection between the at least two cells is convenient.

[0077] It can be understood that in embodiments not shown, the fixing member may also be a chain or a steel wire rope.

[0078] like Figure 6 and Figure 7 As shown, the battery module also includes a fixing plate 184. The plane where the fixing plate 184 is located is perpendicular to the length direction of the outer shell 160. The fixing plate 184 is located inside the outer shell 160. The bottom end of the fixing plate 184 is connected to the upper surface of the bottom plate 161. In this way, the fixing plate 184 is connected to the outer shell 160. The fixing plate 184 is located on the side of each battery cell group 170 along the length direction of the outer shell 160. The battery cell group 170 is attached to the fixing plate 184. As a result, the fixing plate 184 can fix the battery cell group 170, and the position of the battery cell group 170 in the outer shell 160 is fixed.

[0079] Preferably, if Figures 4 to 7 As shown, the battery module further includes a positive electrode connection connector 175, a negative electrode connection connector 176, a first copper bar 171 and a second copper bar 173. The first copper bar 171 is connected to the positive electrode of the battery cell group 170 and the positive electrode connection connector 175. The second copper bar 173 is connected to the negative electrode of the battery cell group 170 and the negative electrode connection connector 176.

[0080] The positive connection tab 175 is connected to the housing 160 and extends to the outer side of the housing 160 away from the battery cell group 170. The negative connection tab 176 is connected to the housing 160 and extends to the outer side of the housing 160 away from the battery cell group 170. The positive connection tab 175 can be connected to other electrical components through a wire, and the negative connection tab 176 can be connected to other electrical components through a wire, so that the battery module can be charged or discharged through the positive connection tab 175 and the negative connection tab 176.

[0081] Preferably, please continue to refer to Figures 4 to 7 The positive electrode connection connector 175 and the negative electrode connection connector 176 are located at the first end plate 163. The positive electrode and the negative electrode of the battery cell group 170 are both located at the upper end of the battery cell group 170. The first copper bar 171 is located above the battery cell group 170. The first copper bar 171 extends along the length direction of the housing 160.

[0082] The second copper bar 173 includes a first copper bar portion 188 and a second copper bar portion 189. The first copper bar portion 188 is located between the battery cell group 170 and the second end plate 164. The first copper bar portion 188 is close to the second end plate 164. The first copper bar portion 188 extends in a vertical direction. The upper end of the first copper bar portion 188 is connected to the negative electrode of the battery cell group 170. The length direction of the second copper bar portion 189 is parallel to the length direction of the housing 160. The second copper bar portion 189 is located between the side plate 162 and the battery cell group 170. The lower end of the first copper bar portion 188 is connected to one end of the second copper bar portion 189. The other end of the second copper bar portion 189 is connected to the negative electrode connection connector 176. As a result, the structure of the battery module is simple.

[0083] Further, the battery module further includes a protection plate 205. The length direction of the protection plate 205 is parallel to the length direction of the second copper bar portion 189. The protection plate 205 is connected to the bottom plate 161 and / or the side plate 162 of the housing 160. The protection plate 205 is located between the second copper bar portion 189 and the battery cell group 170 to separate the second copper bar portion 189 and the battery cell group 170. The second copper bar portion 189 is fixedly connected to the protection plate 205.

[0084] Preferably, if Fig.11 As shown, the battery module further includes a battery bakelite board 181. The battery bakelite board 181 can be insulated and heat-insulated. The battery bakelite board 181 is located between the battery cell and the top plate 190. In this way, the battery bakelite board 181 can prevent the electric energy from being transferred to the top plate 190, and reduce the external heat from being transferred to the battery cell through the top plate 190, thereby playing a role of heat preservation and insulation.

[0085] More preferably, if Fig.11 As shown, the battery module also includes a thermally conductive silicone 182. The thermally conductive silicone 182 can insulate and conduct heat. The thermally conductive silicone 182 wraps the electrodes (positive and negative electrodes) of the battery cell group 170. As a result, the connection between the electrodes of the battery cell group 170 and the copper busbar can be made firm. In addition, the thermally conductive silicone 182 abuts against the top plate 190. The thermally conductive silicone 182 can transfer the heat at the electrodes of the battery cell group 170 to the top plate 190, thereby preventing heat from being concentrated at the electrodes of the battery cell group 170.

[0086] Preferably, the battery bakelite board 181 has a silicone mounting hole 132. The thermal conductive silicone 182 is inserted into the silicone mounting hole 132 and fills the silicone mounting hole 132. Thus, the battery bakelite board 181 can fix the battery cell group 170.

[0087] Preferably, the bottom plate 161 is an aluminum alloy, so that the bottom plate 161 has a small weight and a high thermal conductivity.

[0088] More preferably, the housing 160 is made of aluminum alloy, thereby reducing the weight of the battery module.

[0089] like Figure 4 As shown, the battery module further includes a fire-fighting connector 177. The fire-fighting connector 177 is connected to the housing 160. The fire-fighting connector 177 extends to the interior of the housing 160. The fire-fighting connector 177 is used to be connected to the fire-fighting assembly through a pipeline, so as to spray fire-extinguishing materials into the housing 160.

[0090] Further preferably, the fire-fighting connector 177 is connected to the first end plate 163. Thus, the fire-fighting connector 177, the positive electrode connector 175 and the negative electrode connector 176 are all located on the same side of the housing 160. The structure of the battery module is simple.

[0091] like Fig.11 As shown, the battery module also includes a battery controller 174 and a battery sensor (not shown). The battery controller 174 and the battery sensor are both located in the housing 160. Thus, the housing 160 can protect the battery controller 174. The housing 160 is provided with a control connector 178. The control connector 178 is connected to the housing 160 and extends outside the housing 160.

[0092] like Figure 6 and Fig.11 As shown, the battery controller 174 is electrically connected to the control connector 178, the battery cell group 170 and the battery sensor. The battery controller 174 collects the battery temperature signal representing the temperature of the battery cell group and the voltage signal representing the voltage of the battery cell group 170 through the battery sensor. The control connector 178 is used to electrically connect other components outside the battery module, so that the battery controller 174 communicates with other components outside the battery module through the control connector 178, and then transmits the voltage signal and the battery temperature signal to other components outside the battery module.

[0093] Preferably, if Figure 4 As shown, the housing 160 has a maintenance port. The battery module also includes an inspection door 180 connected to the housing 160. The inspection door 180 is used to open or close the maintenance port. In this way, the battery cell group 170, the battery controller 174 and the battery sensor inside the housing 160 can be repaired by opening the inspection door 180. A sealing strip is provided between the inspection door 180 and the housing 160 to seal the gap between the inspection door 180 and the housing 160.

[0094] Further preferably, the control connector 178 and the maintenance port are both located at the first end plate 163. The inspection door 180 is pivotally connected to the first end plate 163. Thus, the control connector 178, the inspection door 180, the positive electrode connection connector 175, the negative electrode connection connector 176 and the fire protection connector 177 are located at the same end of the housing 160, and the structure of the battery module is simple.

[0095] Preferably, please refer to Figures 4 to 11The battery module also includes a heat transfer member 185. The heat transfer member 185 is a plate member. The heat transfer member 185 is a metal member. The heat transfer member 185 is located below the bottom plate 161 and is attached to the bottom plate 161. The heat transfer member 185 can be connected to the cold plate assembly by a fastener. The heat transfer member 185 is used to attach to the cold plate assembly. In this way, the heat of the battery cell can be transferred to the cold plate assembly through the bottom plate 161 and the heat transfer member 185, which can more effectively cool the battery cell.

[0096] It is understood that in an embodiment not shown, the heat transfer element can be constructed as an integral part with the cold plate assembly. That is, the heat transfer element and the cold plate assembly are integrally formed.

[0097] A limiting portion 186 (an example of a raised portion) is formed on the upper surface of the heat transfer member 185. The shape of the limiting portion 186 is substantially the same as that of the limiting groove 165. In this way, the shapes of the limiting portion and the limiting groove 165 correspond. The limiting portion 186 extends into the limiting groove 165. In this way, the limiting portion 186 and the limiting groove 165 are slidably connected. In this way, the limiting portion 186 and the limiting groove 165 cooperate to limit the position of the housing 160 relative to the heat transfer member 185 in the vertical direction and in the first direction D1. In addition, when the housing 160 is mounted to the heat transfer member 185, the limiting portion 186 enters the limiting groove 165 from the end plate opening 169 along the second direction D2. In this process, the limiting portion 186 and the limiting groove 165 cooperate to guide the movement of the housing 160 when it is connected to the heat transfer member 185.

[0098] like Fig.11 As shown, there is a gap between the battery cell and the side plate 162. There is a gap between the battery cell and the top plate 190. This facilitates the layout of the battery module.

[0099] Please return Figure 4 and Figure 5 The upper end of the first end plate 163 extends and protrudes above the top plate 190. The top plate 190 and the side plate 162 are both abutted against the first end plate 163. Thus, the housing 160 is easily assembled.

[0100] like Figure 4 As shown, the battery module further includes an operating handle 183. The operating handle 183 is pivotally connected to the outer side of the first end plate 163. Thus, the housing 160 can be pushed and pulled by the operating handle 183, so that the housing 160 can be easily loaded and unloaded to the heat transfer member 185.

[0101] like Figure 5 As shown, the battery module further includes a battery explosion-proof valve 179 disposed on an end plate (eg, the second end plate 164). The battery explosion-proof valve 179 extends into the housing 160. Thus, the battery module can be prevented from exploding.

[0102] Preferably, the box body 100 does not include top corner fittings and bottom corner fittings of the container.

[0103] Second embodiment

[0104] In the second embodiment, if Fig.12 As shown, the battery controller 200 is connected to the first end plate of the housing 201. Part of the battery controller 200 is located outside the housing 201. At this time, the battery controller 200 has a control connector. As a result, the structure of the battery module is simple.

[0105] The other configurations of the second embodiment are substantially the same as those of the first embodiment and will not be described in detail here.

[0106] The utility model also provides an energy storage device. The energy storage device includes:

[0107] The aforementioned battery module;

[0108] Heat transfer parts;

[0109] The heat transfer element is arranged between the battery module and the cold plate assembly, and a raised limiting portion is arranged on the heat transfer element, the limiting portion is slidably connected with the limiting groove, and the heat transfer element and the cold plate assembly are contact-connected or integrally formed.

[0110] According to the energy storage device of the utility model, the energy storage device includes the aforementioned battery module, the bottom end of the battery cell group contacts the bottom plate of the shell, the bottom plate contacts the cold plate assembly, or indirectly transfers heat with the cold plate assembly through the heat transfer element, so that the cold plate assembly can effectively cool the battery cell group; in addition, through the setting of the limiting groove, the limiting groove is slidably connected with the cold plate assembly or the heat transfer element, so that the battery module can be conveniently installed on the energy storage device, and the limiting in the horizontal direction is realized, and the limiting in the vertical direction is realized through the protrusion; and the battery module is separately arranged from the cold plate assembly used for heat dissipation and cooling, when the cold plate assembly has problems, the cold plate assembly can be disassembled and replaced separately; the space occupied by the cold plate assembly in the battery module can be reduced, and the energy density of the battery module can be improved.

[0111] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

[0112] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

Claims

1. A battery module, the battery module is used for an energy storage device, characterized in that: The battery module comprises: A housing, the housing comprising a bottom plate, the bottom plate having a limiting groove, the limiting groove comprising an inner top wall surface and two inner side wall surfaces arranged opposite to each other, a lateral protrusion is arranged on at least a portion of the inner side wall surface to form an opening, the limiting groove is used to be slidably connected with the protrusion portion of the cold plate assembly or the heat transfer element, so that the bottom plate contacts the cold plate assembly or the heat transfer element and is limited; A battery cell group is located in the shell, and the bottom end of the battery cell group is in contact with the bottom plate of the shell.

2. The battery module according to claim 1, characterized in that: Along the length direction of the shell, the limiting groove extends to the end of the bottom plate and forms an open end, and the shell is provided with a blocking portion closing the open end.

3. The battery module according to claim 2, characterized in that: The inner wall surface has a straight section extending inward from the opening end, and a first guiding inclined surface is arranged between the straight section and the protrusion, and the first guiding inclined surface is inclined to the length direction of the limiting groove.

4. The battery module according to claim 1, characterized in that: The shell is an aluminum alloy part.

5. The battery module according to claim 1, characterized in that: There are at least two battery cell groups, each of which includes at least two battery cells. The battery module further comprises a fixing member, which is sleeved on the outer circumference of the at least two battery cells of the battery cell group to bind the at least two battery cells, and / or The battery module further includes a fixing plate connected to the outer shell, the fixing plate being located on the side of the battery cell group along the length direction of the outer shell, and the battery cell group being attached to the fixing plate.

6. The battery module according to claim 1, characterized in that: The housing further comprises a top plate, the battery module further comprises a battery bakelite board and thermally conductive silica gel, the battery bakelite board is located between the battery cell group and the top plate, the thermally conductive silica gel penetrates the battery bakelite board and is connected to the electrodes of the battery cell group and the top plate, and / or The battery module also includes an access door connected to the housing.

7. The battery module according to claim 1, characterized in that: The shell is provided with a positive connection connector, a negative connection connector and a fire protection connector. The positive connection connector is connected to the positive electrode of the battery cell group, the negative connection connector is connected to the negative electrode of the battery cell group, and the fire protection connector extends to the interior of the shell.

8. The battery module according to claim 7, characterized in that: The battery module further includes a first copper bar and a second copper bar, wherein the first copper bar is connected to the positive electrode of the battery cell group and the positive electrode connection connector, and the second copper bar is connected to the negative electrode of the battery cell group and the negative electrode connection connector. The first copper bar extends along the length direction of the shell, and part of the second copper bar extends along the vertical direction.

9. The battery module according to claim 8, characterized in that: The second copper bar includes a first copper bar portion and a second copper bar portion, the first copper bar portion extends in a vertical direction, the second copper bar portion extends in a length direction of the shell, the first copper bar portion is connected to the positive electrode of the battery cell group and the second copper bar portion, and the second copper bar portion is connected to the negative electrode connection connector. The battery module further includes a protection plate, which is connected to the housing, and is located between the second copper bar portion and the battery cell group, and the second copper bar portion is fixedly connected to the protection plate.

10. The battery module according to claim 7, characterized in that: The battery module also includes a battery controller and a battery sensor, and the housing is provided with a control connector. The battery controller is electrically connected to the control connector, the battery cell group and the battery sensor. The battery controller is used to collect a battery temperature signal representing the temperature of the battery cell group through the battery sensor. The control connector is used to electrically connect other components outside the battery module so that the controller can communicate with other components outside the battery module through the control connector.

11. The battery module according to claim 10, characterized in that: The battery controller is located within the housing, or The battery controller is coupled to the housing and is at least partially located outside the housing.

12. The battery module according to claim 1, characterized in that: The battery module also includes a battery explosion-proof valve arranged on the shell.

13. The battery module according to claim 1, characterized in that: The housing comprises a first end plate and a top plate, the upper end of the first end plate extends and protrudes above the top plate, the top plate abuts against the first end plate, and / or The battery module further includes an operating handle pivotally connected to an outer side surface of the first end plate.

14. An energy storage device, characterized in that: The energy storage device comprises: The battery module according to any one of claims 1 to 13; Heat transfer parts; The heat transfer member is arranged between the battery module and the cold plate assembly, the heat transfer member is provided with a raised limiting portion, the limiting portion is slidably connected with the limiting groove, and the heat transfer member and the cold plate assembly are contact-connected or integrally formed.

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