Battery pack and electric equipment

Abstract

The invention relates to the technical field of battery cooling, and provides a battery pack and electric equipment, the battery pack comprises a battery cell module, a connecting sheet and an insulating support, and the connecting sheet is located on the outer side of the battery cell module and is electrically connected with the battery cell module. The insulation support is located on the side, back to the battery cell module, of the connecting piece and connected with the connecting piece, the cooling pipeline is located on the side, back to the connecting piece, of the insulation support, and the cooling pipeline is connected with the insulation support. And a cooling medium is arranged in the cooling pipeline. According to the battery pack provided by the embodiment of the invention, the sparking phenomenon between the cooling pipeline and the connecting piece can be effectively reduced or avoided. And a safety accident of the battery caused by a sparking phenomenon between the cooling pipeline and the connecting sheet is prevented, so that the safety of the battery is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of battery cooling technology, and in particular to a battery pack and an electrical device. Background Art

[0002] The battery pack usually generates heat during use, and excessive heat will affect the safety of battery use. Therefore, a cooling system is usually set in the battery pack to cool the battery cells and connectors.

[0003] Currently, for cooling the connecting piece, a cooler is usually arranged next to the connecting piece, and the cooler is located between the connecting piece and the circuit board (or the battery information collector) to cool the connecting piece.

[0004] However, the above-mentioned cooler is prone to ignition, which increases the potential safety hazard of the battery. Summary of the invention

[0005] The present application provides a battery pack and electrical equipment, which can effectively reduce or avoid sparks between a cooling pipe and a connecting piece, thereby improving the safety of the battery.

[0006] One aspect of the present application provides a battery pack, comprising:

[0007] Battery cell module;

[0008] A connecting piece, the connecting piece is located outside the battery cell module and is electrically connected to the battery cell module;

[0009] An insulating bracket, the insulating bracket is located on a side of the connecting piece facing away from the battery core module and is connected to the connecting piece;

[0010] A cooling pipe, the cooling pipe is located on a side of the insulating bracket facing away from the connecting piece, and the cooling pipe is connected to the insulating bracket;

[0011] The cooling pipeline contains a cooling medium.

[0012] In the embodiment of the present application, an insulating bracket is provided between the connecting piece and the cooling pipe. The insulating bracket can provide good electrical insulation between the cooling pipe and the connecting piece, which can effectively reduce or avoid the occurrence of sparks between the cooling pipe and the connecting piece. It prevents the occurrence of sparks between the cooling pipe and the connecting piece, which may cause a safety accident of the battery, thereby effectively improving the safety of the battery. Moreover, by providing an insulating bracket between the connecting piece and the cooling pipe, the cooling pipe can be arranged closer to the connecting piece, which can enable the cooling pipe to provide a better cooling effect on the connecting piece, effectively reduce or avoid high temperature of the connecting piece, thereby effectively improving the safety of the battery pack.

[0013] In a possible implementation, the insulating bracket has a mounting cavity on a side facing away from the connecting plate, and the mounting cavity is concave inwardly toward the connecting plate, and the cooling pipe is located in the mounting cavity.

[0014] In one possible implementation, it also includes:

[0015] A first adhesive layer, wherein the first adhesive layer is located between the insulating support and the connecting piece, and the insulating support and the connecting piece are bonded and connected via the first adhesive layer.

[0016] In a possible implementation, a second adhesive layer is further included, and the second adhesive layer is located between the cooling pipe and the insulating bracket, and the cooling pipe and the insulating bracket are bonded together via the second adhesive layer.

[0017] In a possible implementation, the battery cell module has a mounting frame, the insulating bracket has a clamping portion, and the clamping portion is clamped on the mounting frame.

[0018] In one possible implementation, it also includes:

[0019] A flexible circuit board is located at one end of the battery module, and the flexible circuit board is located between the insulating bracket and the connecting piece, and the flexible circuit board is electrically connected to the connecting piece.

[0020] In a possible implementation, the cooling pipe extends from one end to the other end of the battery core module, and the cooling pipe is bent in an S shape in its extending direction.

[0021] In a possible implementation, a heat dissipation fin is connected to the cooling pipe, and the heat dissipation fin is located on a side of the cooling pipe facing the insulating bracket.

[0022] In one possible implementation, the cooling pipeline includes:

[0023] a first input end, the first input end being connected to a cooling medium source so that the cooling medium is input into the cooling pipe through the first input end;

[0024] a first output end, the first output end is connected to the first input end through the cooling pipeline, and the first output end is used to output the cooling medium in the cooling pipeline;

[0025] The first input end and the first output end are respectively located at two opposite ends of the cooling pipeline.

[0026] In one possible implementation, it also includes:

[0027] A battery information collector, wherein the battery information collector and the flexible circuit board are respectively located at two opposite ends of the battery cell module, and the battery information collector is electrically connected to the connecting sheet;

[0028] The battery information collector is located on a side of the cooling pipe facing away from the insulating bracket.

[0029] In a possible implementation, the battery information collector has a connection pin;

[0030] The insulating bracket is provided with an avoidance notch, and the connecting pin passes through the avoidance notch and extends to the connecting piece.

[0031] In a possible implementation, an insulating sheet is further included, and the insulating sheet is located between the battery information collector and the cooling pipe.

[0032] In one possible implementation, the cooling pipeline includes:

[0033] a second input end, the second input end being connected to a cooling medium source so that the cooling medium is input into the cooling pipe through the second input end;

[0034] A second output end, wherein the second output end is connected to the second input end through the cooling pipeline, and the second output end is used to output the cooling medium in the cooling pipeline.

[0035] In a possible implementation manner, the second input end and the second output end are both located in the middle of the cooling pipe.

[0036] In one possible implementation, the cooling pipe includes

[0037] First pipeline;

[0038] a second pipeline, one end of which is connected to one end of the first pipeline, and the second pipeline is arranged in parallel with the first pipeline;

[0039] a third pipeline, one end of which is connected to the other end of the first pipeline, and the third pipeline is arranged in parallel with the first pipeline;

[0040] The other end of the third pipeline is arranged opposite to the other end of the second pipeline, and both are close to the middle position of the first pipeline;

[0041] The second input end is located on the other end of the second pipeline, and the second output end is located on the other end of the third pipeline.

[0042] In a possible implementation, at least one of the first pipe, the second pipe, and the third pipe is bent in an S shape.

[0043] In one possible implementation, it also includes:

[0044] A tray, wherein the battery cell module is located in the tray;

[0045] The tray comprises a bottom plate and side plates arranged around the bottom plate;

[0046] The base plate has a first cooling circuit, and the cooling pipe is connected to the first cooling circuit.

[0047] In a possible implementation, the first cooling circuit is disposed around the periphery of the bottom plate close to the side plate.

[0048] In one possible implementation, a connecting pipe is further included, one end of which is fixedly connected to and communicated with the cooling pipe, and the other end of which is detachably connected to and communicated with the first cooling circuit, and the cooling pipe and the first cooling circuit are connected through the connecting pipe.

[0049] In a possible implementation, the bottom plate further has a second cooling circuit, and the second cooling circuit is located in the middle of the bottom plate;

[0050] The second cooling circuit is used to cool the battery core, and the first cooling circuit and the second cooling circuit are not connected to each other.

[0051] In one possible implementation, it also includes:

[0052] A filling piece is filled in the tray and is located between the battery cell module and the side plate.

[0053] A second aspect of the present application provides an electrical device comprising any of the above-mentioned battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0055] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0056] Figure 2An exploded view of a battery pack provided in an embodiment of the present application;

[0057] Figure 3 for Figure 2 Enlarged view of area A in the middle;

[0058] Figure 4 A schematic diagram of the structure of a cooling duct provided on one side of a flexible circuit board in a battery cell module provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of the structure of a cooling pipe provided in an embodiment of the present application;

[0060] Figure 6 for Figure 1 Enlarged view of middle area B;

[0061] Figure 7 A schematic diagram of the structure of a cooling pipe on one side of a battery information collector provided in a battery cell module according to an embodiment of the present application;

[0062] Figure 8 A schematic diagram of the structure of another cooling pipeline provided in an embodiment of the present application;

[0063] Fig. 9 A schematic diagram of a structure in which a first cooling circuit is arranged on a bottom plate according to an embodiment of the present application;

[0064] Fig.10 A top view of a battery pack with the cover removed provided in an embodiment of the present application;

[0065] Fig.11 A schematic diagram of the process of assembling a cooling pipe on one side of a battery cell module provided in an embodiment of the present application;

[0066] Fig.12 A schematic diagram of the process of assembling the cooling pipe on the other side of the battery cell module provided in an embodiment of the present application;

[0067] Fig.13 A schematic diagram of a structure in which a connecting pipe provided in an embodiment of the present application is connected to a bottom plate of a tray;

[0068] Fig.14 for Fig.13 Enlarged view of middle area C;

[0069] Fig.15 for Fig.13 Magnified view of area D in the middle.

[0070] Reference numerals:

[0071] 100-battery pack;

[0072] 110-battery module; 111-connecting piece; 112-mounting frame; 113-flexible circuit board; 114-jumper connecting piece; 115-total positive connector; 116-total negative connector; 117-battery cell;

[0073] 120 - insulation bracket; 121 - mounting cavity; 122 - first adhesive layer; 123 - second adhesive layer; 124 - avoidance gap;

[0074] 130-cooling pipe; 131-heat sink; 132-first input end; 133-first output end; 134-second input end; 135-second output end; 136-first pipe; 137-second pipe; 138-third pipe;

[0075] 140-battery information collector; 141-connection pin; 142-insulating sheet;

[0076] 150-protective cover;

[0077] 160-tray; 161-bottom plate; 162-side plate; 163-first cooling circuit;

[0078] 170-cover plate;

[0079] 180-filling piece; 190-connecting pipe. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] An embodiment of the present application provides a battery pack and an electrical device including the battery pack, wherein the electronic device may be any device having a battery pack, such as a mobile phone, an energy storage device, or a vehicle.

[0082] As mentioned in the above background technology, the battery pack will generate heat during use. Excessive heat will affect the safety of battery use. Therefore, a cooling system is usually provided in the battery to cool the battery cells and connecting pieces in the battery pack. At present, for cooling the connecting piece, a cooler is usually provided next to the connecting piece. Among them, a circuit board is electrically connected to the connecting piece on one side of the battery cell module, and a battery information collector is electrically connected to the connecting piece on the other side. The cooler is usually located between the connecting piece and the circuit board (or the battery information collector) to cool the connecting piece.

[0083] However, the above-mentioned cooler is prone to ignition, which increases the potential safety hazard of the battery.

[0084] In some related technologies, the cooler is usually arranged at a position far away from the connecting piece to avoid sparking caused by the cooler being too close to the connecting piece. However, this will seriously reduce the cooling effect of the cooler on the connecting piece.

[0085] In order to solve the above problems, an embodiment of the present application provides a battery pack, which provides better electrical insulation between the cooling pipe and the connecting piece by setting an insulating bracket between the connecting piece, and can effectively reduce or avoid the occurrence of sparks between the cooling pipe and the connecting piece. Preventing sparks between the cooling pipe and the connecting piece from causing safety accidents of the battery, thereby effectively improving the safety of the battery. Moreover, by setting an insulating bracket between the connecting piece and the cooling pipe, the cooling pipe can be set closer to the connecting piece, which can effectively reduce the heat transfer resistance between the cooling pipe and the connecting piece, enable the cooling pipe to provide a better cooling effect on the connecting piece, and effectively reduce or avoid high temperature of the connecting piece, thereby effectively improving the safety of the battery pack.

[0086] The battery pack provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0087] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application is shown in FIG. Figure 2 An exploded view of a battery pack provided in an embodiment of the present application, Figure 3 for Figure 2 A magnified view of area A in the middle. Figure 4 A schematic structural diagram of a cooling duct provided on one side of a flexible circuit board in a battery cell module provided in an embodiment of the present application.

[0088] The present application embodiment provides a battery pack 100, see Figure 1 and Figure 2 As shown, the battery pack 100 may include a battery cell module 110, and the battery cell module may include a battery cell 117 and a connecting sheet 111, and the connecting sheet 111 may be located outside the battery cell module 110 and electrically connected to the battery cell module 110. For example, the battery cell module 110 may include a plurality of battery cells arranged in parallel, and two adjacent battery cells may be electrically connected via the connecting sheet 111.

[0089] The battery pack 100 may further include a tray 160 and a cover plate 170. The cover plate 170 may be placed on the tray 160. The tray 160 and the cover plate 170 may be arranged together to form a receiving cavity. The battery cell module 110, the insulating bracket 120, etc. may all be located in the receiving cavity. The tray 160 may include a bottom plate 161 and a side plate 162 arranged on the bottom plate 161. The bottom plate 161, the side plate 162 and the cover plate 170 may be arranged together to form a receiving cavity to accommodate the battery cell module 110.

[0090] The cover plate 170 may be provided with a cooling circuit, which may be used to cool the battery cells to reduce or avoid excessive temperature of the battery cells that may affect the safety of the battery.

[0091] Combination Figure 3 and Figure 4 As shown, the battery pack 100 may further include an insulating bracket 120 and a cooling pipe 130. The insulating bracket 120 may be located on a side of the connecting sheet 111 facing away from the battery cell module 110 and connected to the connecting sheet 111. For example, the insulating bracket 120 may be connected to the connecting sheet 111 by means of snap connection, buckle connection, bonding, etc.

[0092] The cooling pipe 130 may be located at some of the insulating bracket 120 facing away from the connecting piece 111 , and the cooling pipe 130 may be connected to the insulating bracket 120 . The insulating bracket 120 may provide a mounting platform for the cooling pipe 130 so that the cooling pipe 130 may be fixed next to the connecting piece 111 .

[0093] The cooling pipe 130 may contain a cooling medium, and the cooling medium in the cooling pipe may cool the connecting piece 111 to reduce or avoid a temperature increase of the connecting piece 111, and prevent the temperature of the connecting piece 111 from being too high and causing a battery safety accident, thereby helping to improve the safety of the battery.

[0094] The insulating bracket 120 can provide insulation between the cooling pipe 130 and the connecting piece 111 to reduce or avoid direct contact between the cooling pipe 130 and the connecting piece 111, thereby preventing sparks from occurring between the cooling pipe 130 and the connecting piece 111. This helps to improve the safety of the battery pack 100.

[0095] Moreover, an insulating bracket 120 is provided between the cooling pipe 130 and the connecting piece 111. The insulating bracket 120 may be a sheet-shaped plastic sheet, so that the distance between the cooling pipe 130 and the connecting piece 111 can be reduced, and the cooling pipe 130 can provide a better cooling effect on the connecting piece 111.

[0096] In the embodiment of the present application, an insulating bracket 120 is provided between the connecting piece 111 and the cooling pipe 130. The insulating bracket 120 can provide good electrical insulation between the cooling pipe 130 and the connecting piece 111, which can effectively reduce or avoid the occurrence of sparks between the cooling pipe 130 and the connecting piece 111. It prevents the occurrence of sparks between the cooling pipe 130 and the connecting piece 111, which may cause a safety accident of the battery, thereby effectively improving the safety of the battery. Moreover, by providing the insulating bracket 120 between the connecting piece 111 and the cooling pipe 130, the cooling pipe 130 can be arranged closer to the connecting piece 111, so that the cooling pipe 130 can provide a better cooling effect on the connecting piece 111, which can effectively reduce or avoid the high temperature of the connecting piece 111, thereby effectively improving the safety of the battery pack 100.

[0097] In the related art, a solution is provided for cooling the connecting plate by using a harmonica tube as a cooling tube. However, the solution does not provide an assembly solution for the harmonica tube, which makes it difficult to effectively assemble the cooling tube in the form of a harmonica tube in a battery pack, thus reducing the assemblability of the cooling tube.

[0098] Continue to see Figure 3 As shown, the side of the insulating bracket 120 facing away from the connecting piece 111 may have an installation cavity 121, and the installation cavity 121 may be concave in the direction of the connecting piece 111, that is, it can be understood that the opening of the installation cavity 121 is facing the side facing away from the connecting piece 111, and the installation cavity 121 is concave in the direction of the connecting piece 111. The cooling pipe 130 may be located in the installation cavity 121.

[0099] The installation cavity 121 can provide an installation space for the cooling pipe 130 , which can reduce or avoid contact between the cooling pipe 130 and other components, thereby affecting the cooling pipe 130 from falling or falling off, etc., helping to improve the reliability and stability of the installation of the cooling pipe 130 and enhance the assemblability of the cooling pipe 130 .

[0100] Continue to see Figure 3 As shown, the battery pack 100 may further include a first adhesive layer 122 . The first adhesive layer 122 may be located between the insulating bracket 120 and the connecting sheet 111 . The insulating bracket 120 and the connecting sheet 111 may be bonded and connected via the first adhesive layer 122 .

[0101] This can effectively improve the firmness and reliability of the connection between the insulating bracket 120 and the connecting piece 111 , and can effectively improve the reliability and stability of the insulating bracket 120 in the battery pack 100 .

[0102] For example, the first adhesive layer 122 can be a thermally conductive structural adhesive, which has good thermal conductivity and can provide efficient thermal conductivity between the connecting plate 111 and the cooling pipe 130, thereby helping to improve the heat exchange effect between the connecting plate 111 and the cooling pipe 130 and improve the cooling effect of the cooling pipe 130.

[0103] Continue to see Figure 3 As shown, the battery pack 100 may further include a second adhesive layer 123 . The second adhesive layer 123 may be located between the cooling pipe 130 and the insulating bracket 120 . The cooling pipe 130 and the insulating bracket 120 are bonded and connected via the second adhesive layer 123 .

[0104] This can effectively improve the firmness and reliability of the connection between the cooling pipe 130 and the insulating bracket 120 , and can effectively improve the reliability and stability of the cooling pipe 130 in the battery pack 100 .

[0105] For example, the second adhesive layer 123 may also be a heat-conductive structural adhesive, so that the second adhesive layer can provide efficient heat conduction between the connecting sheet 111 and the cooling pipe 130 , which helps to improve the heat exchange effect between the connecting sheet 111 and the cooling pipe 130 and improve the cooling effect of the cooling pipe 130 .

[0106] Continue to see Figure 3 and Figure 4 As shown, the battery module 110 may have a mounting frame 112, and the insulating bracket 120 may have a clamping portion, which may be clamped on the mounting frame 112. For example, the mounting frame 112 may be arranged around the outer periphery of the connecting sheet 111, and the middle part of the insulating bracket 120 may be fixed to the connecting sheet 111 through the first adhesive layer 122. Both ends (for example, the upper end and the lower end) of the insulating bracket 120 may be clamped on the mounting bracket through the clamping portion.

[0107] This can effectively improve the firmness and reliability of the two ends of the insulating bracket 120 and the battery pack 100, and can effectively reduce or avoid the insulating bracket 120 from falling. It helps to improve the reliability and stability of the cooling pipe 130 in the battery pack 100, and improve the cooling stability of the cooling pipe 130 and the connecting piece 111.

[0108] Continue to see Figure 3As shown, the battery pack 100 may further include a flexible printed circuit 113 (Flexible Printed Circuit; FPC for short), which may be located at one end of the battery cell module 110, and the flexible printed circuit 113 may be located between the insulating bracket 120 and the connecting piece 111, and the flexible printed circuit 113 may be electrically connected to the connecting piece 111. The flexible printed circuit 113 may provide electrical connection between different modules of the battery pack 100. Due to the flexibility of the flexible printed circuit 113, it can adapt to the complex shape and layout of the battery pack 100, ensuring reliable connection between each battery cell and electronic components.

[0109] Among them, since the flexible circuit board 113 is relatively thin, its location between the connecting piece 111 and the insulating bracket 120 will not have a significant impact on the distance between the cooling pipe 130 and the connecting piece 111, that is, it will not affect the cooling effect of the cooling pipe 130 on the connecting piece 111.

[0110] Figure 5 A schematic diagram of the structure of a cooling pipe provided in an embodiment of the present application.

[0111] Continue to see Figure 3 and Figure 4 As shown, the cooling pipe 130 can extend from one end of the battery module 110 to the other end. Figure 5 As shown, the cooling pipe 130 can be S-shaped in its extension direction. The S-shaped bend is also called a serpentine shape, that is, the cooling pipe 130 is curved.

[0112] By extending the cooling pipe 130 from one end to the other end of the battery module 110, the length of the cooling pipe 130 can be increased, so that the cooling pipe 130 can cool the connecting piece 111 over the entire length of the battery module 110. The cooling efficiency of the cooling pipe 130 on the connecting piece 111 can be effectively improved. Moreover, by making the cooling pipe 130 bend in an S shape, the extension length of the cooling pipe 130 can be effectively increased within the same installation space, and the distribution area of ​​the cooling pipe 130 can be increased, thereby effectively improving the cooling effect of the cooling pipe 130.

[0113] By adjusting the S-shaped bending degree of the cooling pipe 130, the extension length of the cooling pipe 130 can be changed, and the cooling area of ​​the cooling pipe 130 can be effectively changed. Thus, the cooling effect of the cooling pipe 130 is changed, and the controllability of the cooling of the cooling pipe 130 is effectively improved.

[0114] Continue to see Figure 5As shown, a heat sink 131 may be connected to the cooling pipe 130, and the heat sink 131 may be located on the side of the cooling pipe 130 facing the insulating bracket 120. The heat emitted by the connecting piece 111 may be exchanged with the cooling medium through the heat sink 131 to cool the connecting piece 111. The heat sink 131 may effectively increase the cooling area of ​​the cooling pipe 130 and improve the cooling efficiency.

[0115] Continue to see Figure 5 As shown, the cooling pipeline 130 may include a first input end 132 and a first output end 133. The first input end 132 may be used to communicate with a cooling medium source, so that the cooling medium may be input into the cooling pipeline 130 through the first input end 132. The first output end 133 may be connected to the first input end 132 through the cooling pipeline 130, and the first output end 133 is used to output the cooling medium in the cooling pipeline 130.

[0116] For example, the cooling medium can be input into the cooling pipe 130 through the first input end 132 to perform heat exchange in the cooling pipe 130, thereby cooling the connecting piece 111 through the cooling pipe 130. The temperature of the cooling medium after heat exchange will increase. At this time, the heated cooling medium can be output through the first output end 133, so that the first input end 132 can re-input the low-temperature cooling medium, thereby improving the cooling effect of the cooling pipe 130.

[0117] See also Figure 4 As shown, the battery pack 100 may also include a jumper connecting piece 114, which is also called a busbar. The jumper connecting piece 114 is used to connect multiple battery modules 110 in series or in parallel to form a required voltage and capacity configuration. Through this connection method, a complete battery pack 100 can be assembled to meet specific power requirements.

[0118] For example, the battery pack 100 may include a plurality of battery modules 110, and each battery module 110 may be electrically connected via a jumper connecting piece 114. The jumper connecting piece 114 may be located at both ends of the battery module 110, or may be located in the middle of the battery module 110.

[0119] For example, see Figure 4 As shown, on one side of the battery cell module 110 where the flexible circuit board 113 is disposed, the jumper connecting piece 114 can be located in the middle of the battery cell module 110 .

[0120] See also Figure 4 and Figure 5As shown, the first input terminal 132 and the first output terminal 133 may be located at opposite ends of the cooling pipe 130, respectively. In this way, the distance between the cooling pipe 130 and the jumper connecting piece 114 can be increased. This can prevent the cooling pipe 130 and the jumper connecting piece 114 from being too close to each other and causing ignition, thereby helping to improve the safety of the battery pack 100.

[0121] Figure 6 for Figure 1 The enlarged view of area B in the middle Figure 7 A schematic structural diagram of a cooling duct provided on one side of a battery information collector of a battery cell module provided in an embodiment of the present application.

[0122] See also Figure 6 and Figure 7 As shown, the battery pack 100 may further include a battery information collector 140 (battery information collector, abbreviated as: BIC), the battery information collector 140 and the flexible circuit board 113 may be respectively located at two opposite ends of the battery cell module 110, and the battery information collector 140 may be electrically connected to the connecting piece 111. That is, the flexible circuit board 113 is disposed at one end of the battery cell module 110, and the battery information collector 140 is disposed at the other end.

[0123] The battery information collector 140 can be located on the side of the cooling pipe 130 facing away from the insulating bracket 120. The size of the battery information collector 140 is relatively large and the thickness is also relatively thick. By arranging the battery information collector 140 on the side of the cooling pipe 130 facing away from the insulating bracket 120, it is possible to avoid the battery information collector 140 from having an adverse effect on the distance between the cooling pipe 130 and the connecting piece 111. The distance between the cooling pipe 130 and the connecting piece 111 can be reduced, and the cooling effect of the cooling pipe 130 on the connecting piece 111 can be improved.

[0124] Continue to see Figure 6 and Figure 7 As shown, the battery information collector 140 may have a connecting pin 141, and the insulating bracket 120 may be provided with an avoidance notch 124, and the connecting pin 141 may pass through the avoidance notch 124 and extend to the connecting piece 111. The avoidance notch 124 on the insulating bracket 120 may provide an extension channel for the connecting pin 141 on the battery information collector 140, which may reduce or avoid the insulating bracket 120 blocking the connection between the battery information collector 140 and the connecting piece 111. The electrical connection between the battery information collector 140 and the connecting piece 111 may be facilitated, and the reliability and stability of the electrical connection between the battery information collector 140 and the connecting piece 111 may be improved.

[0125] For example, the connecting pin 141 and the connecting piece 111 may be electrically connected by welding, which can effectively improve the firmness and reliability of the electrical connection between the connecting pin 141 and the connecting piece 111 .

[0126] Continue to see Figure 6 As shown, the battery pack 100 may further include an insulating sheet 142, and the insulating sheet 142 may be located between the battery information collector 140 and the cooling pipe 130. That is, the insulating sheet 142 may be located on the side of the battery information collector 140 facing the cooling pipe 130. The insulating sheet 142 may provide electrical isolation between the battery information collector 140 and the cooling pipe 130, which may reduce or avoid the occurrence of ignition between the battery information collector 140 and the cooling pipe 130, and help improve the safety of the battery pack 100.

[0127] For example, the insulating sheet 142 may be a mica sheet, which has high resistivity and dielectric strength, can effectively prevent current leakage, and is an ideal electrical insulating material, which can effectively improve the electrical insulation effect of the insulating sheet 142 and enhance the safety of the battery pack 100.

[0128] Figure 8 A schematic diagram of the structure of another cooling pipe provided in an embodiment of the present application.

[0129] See also Figure 7 and Figure 8 As shown, in the embodiment of the present application, the cooling pipe 130 may include a second input end 134 and a second output end 135, and the second input end 134 may be used to communicate with a cooling medium source, so that the cooling medium is input into the cooling pipe 130 through the second input end 134. The second output end 135 is connected to the second input end 134 through the cooling pipe 130, and the second output end 135 is used to output the cooling medium in the cooling pipe 130.

[0130] For example, the cooling medium can be input into the cooling pipe 130 through the second input end 134 to perform heat exchange in the cooling pipe 130, thereby cooling the connecting piece 111 through the cooling pipe 130. The temperature of the cooling medium after heat exchange will increase. At this time, the heated cooling medium can be output through the second output end 135, so that the second input end 134 can re-input the low-temperature cooling medium, thereby improving the cooling effect of the cooling pipe 130.

[0131] The second input end 134 and the second output end 135 may both be located in the middle of the cooling pipe 130. Figure 7As shown, on one side of the battery cell module 110 where the battery information collector 140 is arranged, the jumper connecting piece 114 can be located at both ends of the battery cell module 110. In this way, by making the second input terminal 134 and the second output terminal 135 both located in the middle of the cooling pipe 130, the distance between the cooling pipe 130 and the jumper connecting piece 114 can be increased. This can prevent the cooling pipe 130 from being too close to the jumper connecting piece 114 and causing ignition, which helps to improve the safety of the battery pack 100.

[0132] For details, see Figure 8 As shown, the cooling pipe 130 may include a first pipe 136 , a second pipe 137 and a third pipe 138 , one end of the second pipe 137 may be connected to one end of the first pipe 136 , and the second pipe 137 and the first pipe 136 may be arranged in parallel.

[0133] One end of the third pipe 138 can be connected to the other end of the first pipe 136, and the third pipe 138 and the first pipe 136 can also be arranged in parallel. The other end of the third pipe 138 and the other end of the second pipe 137 can be arranged opposite to each other and both are close to the middle position of the first pipe 136.

[0134] The second input end 134 is located at the other end of the second pipe 137 , and the second output end 135 is located at the other end of the third pipe 138 .

[0135] That is, it can be understood that the cooling pipe 130 is a U-shaped structure, and the input end and the output end of the cooling pipe 130 are both located in the middle of the cooling pipe 130. This can effectively increase the distance between the cooling pipe 130 and the jumper connecting piece 114. It can prevent the cooling pipe 130 and the jumper connecting piece 114 from being too close to each other and causing ignition, which helps to improve the safety of the battery pack 100.

[0136] Moreover, within the same installation length, the extension length of the cooling pipe 130 can be effectively increased, the cooling area of ​​the cooling pipe 130 can be effectively increased, and the cooling efficiency of the cooling pipe 130 on the connecting piece 111 can be improved.

[0137] In the embodiment of the present application, at least one of the first pipe 136, the second pipe 137 and the third pipe 138 may be bent in an S-shape. For example, only one of the pipes may be bent in an S-shape, or two of the pipes may be bent in an S-shape. Alternatively, in some examples, the first pipe 136, the second pipe 137 and the third pipe 138 may all be bent in an S-shape.

[0138] This can effectively increase the extension length of the cooling pipe 130 , and can effectively increase the cooling area of ​​the cooling pipe 130 , so that the cooling pipe 130 can provide a better cooling effect for the connecting piece 111 , thereby effectively improving the cooling efficiency of the cooling pipe 130 .

[0139] Continue to see Figure 6 and Figure 7 As shown, the battery pack 100 may further include a protective cover 150, which may be covered on the cooling pipe 130 and connected to the insulating bracket 120. For example, on the side where the flexible circuit board 113 is provided on the battery cell module 110, the protective cover 150 may be covered on the cooling pipe 130 and connected to the insulating bracket 120. On the side where the battery cell module 110 is provided with the battery information collector 140, since the battery information collector 140 is provided on the side of the cooling pipe 130 facing away from the insulating bracket 120, the protective cover 150 may be covered on the battery information collector 140.

[0140] The protective cover 150 can provide anti-impact protection for the cooling pipe 130, the insulating bracket 120, the battery information collector 140, and the flexible circuit board 113, etc., and can reduce or prevent the impact force outside the battery pack from being transmitted to the above components, thereby reducing or preventing damage to the above components. Moreover, the protective cover 150 can also play a good electrical isolation role, which can reduce or prevent the occurrence of sparks between the battery information collector 140 and the flexible circuit board 113 and external devices. It helps to improve the safety of the battery.

[0141] Fig. 9 A schematic diagram of the structure in which a first cooling circuit is provided on a base plate in an embodiment of the present application.

[0142] See also Fig. 9 As shown, a first cooling circuit 163 may be provided on the bottom plate 161 of the tray 160, and the cooling pipe 130 may be connected to the first cooling circuit 163. The cooling medium in the first cooling circuit 163 may flow into the cooling pipe 130 to cool the connecting plate 111.

[0143] For example, the first cooling circuit 163 may be connected to a thermal management system of the vehicle so that a cooling medium is transported to the first cooling circuit 163 through the thermal management system of the vehicle to cool the connecting plate 111 .

[0144] Continue to see Fig. 9 As shown, the first cooling circuit 163 can be arranged around the periphery of the bottom plate 161 near the side plate 162. For example, a second cooling circuit can be provided in the middle of the bottom plate 161, and the second cooling circuit can be used to cool the battery cell.

[0145] The first cooling circuit 163 on the periphery of the bottom plate 161 and the second cooling circuit in the middle of the bottom plate 161 may not be connected to each other, that is, the cooling system of the connecting piece 111 and the cooling system of the battery cell are independent of each other. This can avoid the influence of the cooling of the main cooling zone on the cooling of the connecting piece 111.

[0146] For example, the battery cell needs to be cooled down when the weather is hot, and needs to be heated when the weather is cold. That is, the main cooling zone needs to cool down the battery cell or heat the battery cell according to different working conditions. The connecting piece 111 does not need to be heated, but only needs to be cooled down.

[0147] By setting the first cooling circuit 163 on the periphery of the bottom plate 161, the cooling system of the connecting plate 111 can be made independent of the cooling system of the battery cell, which can avoid heat being transferred to the connecting plate 111 when the battery cell is heated, causing heat waste. This helps to improve the rationality of the setting of the cooling system of the connecting plate 111 and enhance the energy-saving effect of the battery pack 100.

[0148] For example, see Fig. 9 As shown, the cooling pipe 130 and the first cooling circuit 163 may be connected via a connecting pipe 190. Specifically, one end of the connecting pipe 190 may be connected to the cooling pipe 130, and the other end may be connected to the first cooling circuit 163, so that the first cooling circuit 163 and the cooling pipe 130 may be connected to each other via the connecting pipe 190, so that the cooling medium may flow between the first cooling circuit 163 and the cooling pipe 130.

[0149] Among them, the connecting pipe 190 and the cooling pipe can be fixedly connected, and the connecting pipe 190 and the first cooling circuit 163 can be detachably connected. For example, the connecting pipe 190 and the first cooling circuit can be connected by a quick-connect connector, which can facilitate the connection between the connecting pipe 190 and the first cooling circuit 163 and help improve the connection efficiency between the connecting pipe 190 and the first cooling circuit 163.

[0150] Among them, in the embodiment of the present application, the cooling medium in the first cooling circuit 163 can be 50% ethylene glycol and 50% water. The mixture of ethylene glycol and water can significantly lower the freezing point, which can effectively prevent the cooling medium from freezing in a cold environment, and help improve the stability of the cooling medium when used in a cold environment.

[0151] The inlet flow rate of the cooling medium can be 2 to 3 L / min, which can effectively increase the circulation speed of the cooling medium and help improve the cooling efficiency.

[0152] The cooling medium in the second cooling circuit can be tetrafluoroethane (R134a for short).

[0153] Fig.10 A top view of a battery pack with the cover removed provided in an embodiment of the present application.

[0154] See also Fig.10 As shown, the battery pack 100 may further include a filler 180, which may be filled in the tray 160 and located between the battery cell module 110 and the side panel 162. For example, the filler 180 may be made of a foaming material, and the filler 180 may be located above the first cooling circuit 163, that is, the filler 180 may be located on the first cooling circuit 163 except for the portion connected to the connecting pipe 190. Since there is no battery cell module 110 above the first cooling circuit 163, the portion above it is in a vacant state, which may affect the overall rigidity and structural stability of the battery pack 100. By arranging the filler 180 in the direction of the first cooling circuit 163, the structural strength and rigidity of the portion above the first cooling circuit 163 may be effectively improved, thereby improving the structural stability of the battery pack 100.

[0155] Moreover, by arranging the filling piece 180 above the first cooling circuit 163, the filling piece 180 can also provide protection for the connecting pipe 190, which can reduce or avoid the squeezing of the connecting pipe 190 under the action of external force, help to improve the protection of the connecting pipe 190, and improve the reliability and stability of the connection between the connecting pipe 190 and the first cooling circuit 163.

[0156] In addition, the filler can also provide installation space for the connecting tube in the direction between the battery cell module and the side plate of the tray, which can facilitate the installation of the connecting tube and help improve the overall assemblability of the battery pack.

[0157] Continue to see Fig.10 As shown, the battery pack 100 may further include a total positive terminal 115 and a total negative terminal 116, and the total positive terminal 115 and the total negative terminal 116 may be respectively located at the two ends of the battery cell module 110. This can reduce and avoid the total positive terminal 115 and the total negative terminal 116 being set in the middle part of the battery cell module 110 to increase the occupied space of the two, which helps to reduce the occupied space of the total positive terminal 115 and the total negative terminal 116 in the tray 160, so that more battery cells can be arranged in the tray 160, which helps to improve the energy of the battery pack 100.

[0158] The tray 160 of the battery pack 100 may also have a potting compound (not shown in the figure), and the cooling pipe 130 may be located in the potting compound. For example, after the insulating bracket 120, the cooling pipe 130, the connecting pipe 190, and the filling member 180 are assembled, the potting compound may be injected into the cavity of the tray 160 to fill the gaps in the tray 160.

[0159] The potting compound can increase the electrical clearance within the battery pack 100, avoid arcing and sparking caused by special circumstances, and help improve the safety of the battery pack 100. Moreover, the potting compound also has a good sealing and protective effect. In addition, the potting compound can also strengthen and stabilize the connection between the connecting tube 190 and the cooling pipe 130 and the first cooling circuit 163, which can reduce and avoid the separation between the connecting tube 190 and the cooling pipe 130 and the first cooling circuit 163, and help improve the firmness and reliability of the connection between the connecting tube 190 and the cooling pipe 130 and the first cooling circuit 163.

[0160] The cooling assembly process of the connecting piece provided in the embodiment of the present application is introduced below with reference to the accompanying drawings.

[0161] Fig.11 A schematic diagram of the process of assembling the cooling duct on one side of the battery cell module provided in an embodiment of the present application.

[0162] The present application embodiment may also provide an assembly process for a cooling system of a battery pack 100, see Fig.11 As shown, taking the side of the battery module 110 where the flexible circuit board 113 is provided as an example, the assembly process may include:

[0163] S101: Insert the connecting piece 111 into the mounting frame 112;

[0164] S102: Disposing a first adhesive layer 122 on a surface of the insulating bracket 120 facing the connecting piece 111;

[0165] S103: buckle the insulating bracket 120 with the mounting bracket 112, and bond the first adhesive layer 122, one side facing away from the insulating bracket 120, to the connecting sheet 111 and the flexible circuit board 113 respectively;

[0166] S104: Disposing a second adhesive layer 123 in the mounting cavity 121 of the insulating bracket 120;

[0167] S105: installing the cooling pipe 130 in the installation cavity 121 and bonding it to the second bonding layer 123;

[0168] S106 : placing a protective cover on the cooling pipe 130 and connecting it to the insulating support 120 .

[0169] Fig.12 A schematic diagram of the process of assembling the cooling pipe on the other side of the battery cell module provided in an embodiment of the present application.

[0170] See also Fig.12 As shown, the cooling system of the connecting piece 111 on one side of the battery information collector 140 of the battery cell module 110 is installed as follows:

[0171] S201: Insert the connecting piece 111 into the mounting frame 112;

[0172] S202: Disposing a first adhesive layer 122 on a surface of the insulating bracket 120 facing the connecting piece 111;

[0173] S203: buckle the insulating bracket 120 and the mounting frame 112, and bond the first adhesive layer 122, one side facing away from the insulating bracket 120, to the connecting piece 111 respectively;

[0174] S204: Disposing a second adhesive layer 123 in the mounting cavity 121 of the insulating bracket 120;

[0175] S205: installing the cooling pipe 130 in the installation cavity 121 and bonding it to the second bonding layer 123;

[0176] S206: installing the battery information collector 140 on the cooling pipe 130, and welding the connecting pin 141 on the battery information collector 140 to the connecting piece 111;

[0177] S207 : placing a protective cover on the battery information collector 140 and connecting it to the insulating bracket 120 .

[0178] After installing the cooling system of the connecting piece 111, the tray 160 can be installed. The tray 160 can be installed by an inverted buckle process, that is, the tray 160 opening can be placed on the battery module 110 with the opening facing downward. Then the battery module 110 and the tray 160 are turned over 180 degrees as a whole, so that the opening of the tray 160 faces upward, and the battery module 110 is located in the cavity of the tray 160.

[0179] Fig.13 A schematic diagram of a structure in which a connecting pipe is connected to a tray bottom plate according to an embodiment of the present application. Fig.14 for Fig.13 The enlarged view of area C in the middle, Fig.15 for Fig.13 Magnified view of area D in the middle.

[0180] Among them, see Figures 13 to 15As shown, in order to facilitate the connection between the connecting tube 190 and the first cooling circuit 163 on the bottom plate 161 of the tray 160, before the tray 160 is placed on the battery module 110, the end of the connecting tube 190 connected to the first cooling circuit 163 can be fixed in advance on the side of the battery module 110 facing away from the bottom plate 161 of the tray 160. In this way, after the tray 160 and the battery module 110 are flipped over together, the end of the connecting tube 190 connected to the first cooling circuit 163 is located on the upper surface of the battery module 110. At this time, the end of the connecting tube 190 connected to the first cooling circuit 163 can be removed and connected to the first cooling circuit 163 on the bottom plate 161 of the tray 160. That is, the end of the connecting tube 190 connected to the first cooling circuit 163 can be connected along Fig.14 and Fig.15 Remove it in the direction of the arrow in the figure and connect it to the first cooling circuit 163 on the bottom plate 161, so that the connection between the connecting pipe 190 and the first cooling circuit 163 can be facilitated, and the accuracy of the connection between the connecting pipe 190 and the first cooling circuit 163 can be improved.

[0181] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0182] In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0183] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can make the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack, characterized in that: include: A battery cell module (110), the battery cell module (110) comprising: A plurality of battery cells (117) arranged in parallel; A connecting sheet (111), the connecting sheet (111) being located outside the battery core module (110), and two adjacent battery cores (117) being electrically connected via the connecting sheet; An insulating support (120), the insulating support (120) being located on a side of the connecting piece (111) facing away from the battery core module (110) and being connected to the connecting piece (111); a cooling pipe (130), the cooling pipe (130) being located on a side of the insulating support (120) facing away from the connecting piece (111), and the cooling pipe (130) being connected to the insulating support (120); The cooling pipe (130) contains a cooling medium.

2. The battery pack according to claim 1, characterized in that: The insulating bracket (120) has a mounting cavity (121) on a side facing away from the connecting plate (111), and the mounting cavity (121) is concave in the direction of the connecting plate (111), and the cooling pipe (130) is located in the mounting cavity (121).

3. The battery pack according to claim 2, characterized in that: Also includes: A first adhesive layer (122), wherein the first adhesive layer (122) is located between the insulating support (120) and the connecting piece (111), and the insulating support (120) and the connecting piece (111) are bonded and connected via the first adhesive layer (122).

4. The battery pack according to claim 3, characterized in that: It also includes a second adhesive layer (123), wherein the second adhesive layer (123) is located between the cooling pipe (130) and the insulating support (120), and the cooling pipe (130) and the insulating support (120) are bonded and connected via the second adhesive layer (123).

5. The battery pack according to claim 4, characterized in that: The battery core module (110) is provided with a mounting frame (112), and the insulating bracket (120) is provided with a clamping portion, wherein the clamping portion is clamped on the mounting frame (112).

6. The battery pack according to any one of claims 1 to 5, characterized in that: Also includes: A flexible circuit board (113), wherein the flexible circuit board (113) is located at one end of the battery cell module (110), and the flexible circuit board (113) is located between the insulating bracket (120) and the connecting piece (111), and the flexible circuit board (113) is electrically connected to the connecting piece (111).

7. The battery pack according to claim 6, characterized in that: The cooling pipe (130) extends from one end of the battery core module (110) to the other end, and the cooling pipe (130) is bent in an S shape in its extending direction.

8. The battery pack according to claim 7, characterized in that: The cooling pipe (130) is connected to a heat dissipation sheet (131), and the heat dissipation sheet (131) is located on a side of the cooling pipe (130) facing the insulating bracket (120).

9. The battery pack according to claim 8, characterized in that: The cooling pipeline (130) comprises: a first input end (132), the first input end (132) being connected to a cooling medium source so that the cooling medium is input into the cooling pipe (130) through the first input end (132); a first output end (133), the first output end (133) being connected to the first input end (132) via the cooling pipe (130), the first output end (133) being used to output the cooling medium in the cooling pipe (130); The first input end (132) and the first output end (133) are respectively located at two opposite ends of the cooling pipe (130).

10. The battery pack according to claim 6, characterized in that: Also includes: A battery information collector (140), wherein the battery information collector (140) and the flexible circuit board (113) are respectively located at two opposite ends of the battery core module (110), and the battery information collector (140) is electrically connected to the connecting piece (111); The battery information collector (140) is located on a side of the cooling pipe (130) facing away from the insulating bracket (120).

11. The battery pack according to claim 10, characterized in that: The battery information collector (140) has a connecting pin (141); The insulating bracket (120) is provided with an avoidance notch (124), and the connecting pin (141) passes through the avoidance notch (124) and extends to the connecting piece (111).

12. The battery pack according to claim 10, characterized in that: It also includes an insulating sheet (142), wherein the insulating sheet (142) is located between the battery information collector (140) and the cooling pipe (130).

13. The battery pack according to claim 10, characterized in that: The cooling pipeline (130) comprises: a second input end (134), the second input end (134) being connected to a cooling medium source so that the cooling medium is input into the cooling pipe (130) through the second input end (134); A second output end (135), the second output end (135) is connected to the second input end (134) via the cooling pipe (130), and the second output end (135) is used to output the cooling medium in the cooling pipe (130).

14. The battery pack according to claim 13, characterized in that: The second input end (134) and the second output end (135) are both located at a middle position of the cooling pipe (130).

15. The battery pack according to claim 14, characterized in that: The cooling pipeline (130) includes a first conduit (136); a second pipeline (137), one end of the second pipeline (137) being connected to one end of the first pipeline (136), and the second pipeline (137) and the first pipeline (136) being arranged in parallel; a third pipeline (138), one end of the third pipeline (138) being connected to the other end of the first pipeline (136), and the third pipeline (138) and the first pipeline (136) being arranged in parallel; The other end of the third pipe (138) is arranged opposite to the other end of the second pipe (137), and both are close to the middle position of the first pipe (136); The second input end (134) is located at the other end of the second pipeline (137), and the second output end (135) is located at the other end of the third pipeline (138).

16. The battery pack according to claim 15, characterized in that: At least one of the first pipe (136), the second pipe (137) and the third pipe (138) is bent in an S shape.

17. The battery pack according to any one of claims 1 to 5, characterized in that: Also includes: A tray (160), wherein the battery cell module (110) is located in the tray (160); The tray (160) comprises a bottom plate (161) and side plates (162) arranged around the bottom plate (161); The bottom plate (161) is provided with a first cooling circuit (163), and the cooling pipe (130) is connected to the first cooling circuit (163).

18. The battery pack according to claim 17, characterized in that: The first cooling circuit (163) is arranged near the side plate (162) and around the periphery of the bottom plate (161).

19. The battery pack according to claim 17, characterized in that: It also includes a connecting pipe (190), one end of which is fixedly connected to and communicated with the cooling pipe (130), and the other end of which is detachably connected to and communicated with the first cooling circuit (163); the cooling pipe (130) and the first cooling circuit (163) are connected via the connecting pipe (190).

20. The battery pack according to claim 18, characterized in that: The bottom plate (161) also has a second cooling circuit, and the second cooling circuit is located in the middle of the bottom plate (161); The second cooling circuit is used to cool the battery core, and the first cooling circuit (163) and the second cooling circuit are not connected to each other.

21. The battery pack according to claim 17, characterized in that: Also includes: A filling piece (180), the filling piece (180) is filled in the tray (160) and is located between the battery cell module (110) and the side plate (162).

22. An electrical equipment, characterized in that: A battery pack comprising any one of claims 1 to 19.

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