Battery module and manufacturing method thereof, battery pack and electric equipment

Abstract

The invention discloses a battery module and a manufacturing method thereof, a battery pack and electric equipment. The battery module comprises a battery cell assembly, a first buffer part, a first blocking part, a first detection part and a first bonding part, the battery cell assembly comprises a plurality of battery cells, each battery cell comprises a battery cell shell and an electrode assembly, the battery cell shell comprises a main body part, the electrode assembly is arranged on the main body part, and the plurality of battery cells comprise a first battery cell and a second battery cell which are adjacent to each other. And the first buffer piece is positioned between the main body part of the first battery cell and the main body part of the second battery cell. The first blocking piece is connected with the main body part of the first battery cell; the first blocking piece comprises a first part positioned between the first battery cell and the second battery cell and a second part extending out of the main body part of the first battery cell and the main body part of the second battery cell; the first detection piece comprises a first detection part arranged on the main body part of the first battery cell, and the second part and the first detection part are oppositely arranged. The first bonding part is bonded with the first detection part and the main body part of the first battery cell, and the first bonding part is separated from the second battery cell.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery module and a manufacturing method thereof, a battery pack and an electrical device. Background Art

[0002] At present, battery modules are widely used in drones, electric vehicles, smart energy storage equipment and other fields. In order to facilitate the management of battery modules, it is necessary to detect the data of the battery cells in the battery modules. The detection parts and the battery cells are not easy to fix, and the connection position between the detection parts and the battery cells can easily affect the accuracy of the detection. Summary of the invention

[0003] In view of this, it is necessary to provide a battery module and a manufacturing method thereof, a battery pack and an electrical device to facilitate the installation of a detection component on a battery cell and improve the accuracy of detection.

[0004] An embodiment of the present application provides a battery module, including a cell assembly, a first buffer, a first blocking member, a first detection member and a first adhesive member. The cell assembly includes a plurality of cells, the cell includes a cell housing and an electrode assembly, the cell housing includes a main body, the electrode assembly is arranged on the main body, and the plurality of cells include adjacent first cells and second cells. The first buffer is located between the main body of the first cell and the main body of the second cell. The first blocking member is connected to the main body of the first cell, the first blocking member includes a first part and a second part, the first part is located between the first cell and the second cell, and the second part extends out of the main body of the first cell and the main body of the second cell. The first detection member includes a first detection part arranged on the main body of the first cell, and the second part is arranged opposite to the first detection part. The first adhesive member bonds the first detection part and the main body of the first cell, and the first adhesive member is separated from the second cell. The first blocking member is provided to limit the position of the first detection unit, and the first adhesive member bonds the first detection unit to the cell shell of the first cell, so that the first detection unit can be easily installed on the main body of the first cell, thereby improving the detection accuracy of the first detection unit.

[0005] In one or more optional embodiments above, the first adhesive bonds the first detection part, the main body of the first battery cell and the first blocking member, which further facilitates the installation of the first detection part on the surface of the battery cell shell of the first battery cell and is conducive to fixing the first detection part.

[0006] In one or more optional embodiments above, the first barrier has a Shore hardness C less than or equal to the Shore hardness C of the first buffer. When the battery cell expands, the first barrier between the first battery cell and the second battery cell may be compressed together with the first buffer, reducing the effect of the first barrier on the expansion of the battery cell.

[0007] In one or more optional embodiments above, the battery cell includes an electrode terminal, the battery cell housing includes a sealing portion connected to the main body, the electrode terminal is connected to the electrode assembly, and extends from the sealing portion to the battery cell housing. Along the first direction, the first detection portion is located between the second portion and the sealing portion of the first battery cell, along the first direction, the projection of the first detection portion overlaps with the projection of the electrode terminal, and the first direction is the thickness direction of the battery cell, so that the first detection portion can better detect the temperature of the body of the battery cell.

[0008] In one or more optional embodiments above, the main body of the first battery cell includes a first wall connected to the first buffer, and along the first direction, the distance between the first detection part and the sealing part of the first battery cell is greater than the distance between the first detection part and the first wall. This makes the first detection part closer to the first wall, which is conducive to improving the accuracy of the first detection part in detecting the temperature of the main body of the battery cell.

[0009] In one or more of the above optional embodiments, the first blocking member is bonded to the first buffer member, which helps to reduce the movement of the first blocking member.

[0010] In one or more optional embodiments above, the second battery cell and the first battery cell are arranged along the first direction, and along the first direction, the projection of the second portion covers the projection of the first detection portion. The second portion reduces overflow of the first adhesive.

[0011] In one or more optional embodiments above, the battery module includes a first circuit board, the first circuit board and the main body are arranged along the second direction, the first circuit board includes at least one opening, and the opening passes through the first circuit board along the second direction. The first circuit board is provided with a plurality of conductive sheets, and the plurality of conductive sheets include a first conductive sheet and a second conductive sheet. The first battery cell includes a first electrode terminal connected to the first conductive sheet, the second battery cell includes a second electrode terminal connected to the second conductive sheet, the first detection member includes a first wire, the first electrode terminal, the second electrode terminal, and the first wire pass through the same opening, and the first wire is connected to the first circuit board. It is convenient for assembly and helps to improve assembly efficiency.

[0012] In one or more of the above optional embodiments, the first detection unit is a temperature detection element.

[0013] In one or more optional embodiments above, the first adhesive member is configured to be formed by disposing the first insulating material on the outer side of the first detection portion and then curing it.

[0014] In one or more of the above optional embodiments, the first buffer component includes foam.

[0015] In one or more of the above optional embodiments, the first barrier element includes foam.

[0016] In one or more of the above optional embodiments, the first detection element includes a negative temperature coefficient thermistor.

[0017] In one or more of the above optional embodiments, the first adhesive member includes glue.

[0018] In one or more of the above optional embodiments, the thermal conductivity of the thermal conductive adhesive is 0.8W / (m·K)-2W / (m·K), which is conducive to the thermal conductive adhesive transferring the heat of the battery cell to the first detection unit.

[0019] In one or more of the above optional embodiments, the difference between the Shore hardness C of the first buffer and the Shore hardness C of the first barrier is greater than 10, which further reduces the effect of the first barrier on the expansion of the battery cell.

[0020] The present application provides a method for manufacturing a battery module in any one of the above embodiments, comprising the following steps: placing a first buffer between a first battery cell and a second battery cell. Placing a first blocking member between the first battery cell and the second battery cell, so that the first portion is located between the first battery cell and the second battery cell, and the second portion extends out of the main body of the first battery cell and the main body of the second battery cell. Placing a first detection portion on the main body of the first battery cell. Bonding the first detection portion and the main body of the first battery cell with a first adhesive.

[0021] The present application provides a battery module, including a cell assembly, a first blocking member, a first detection member and a first adhesive member. The cell assembly includes a plurality of cells, each cell including a cell housing and an electrode assembly, the cell housing including a main body, the electrode assembly being disposed in the main body, and the plurality of cells including a first cell located at the outermost side. The first buffer member is connected to a first wall of the first cell, the first wall being a side wall of the main body of the first cell away from the main body of other cells. The first blocking member is connected to the first buffer member. The first detection member includes a first detection portion disposed in the main body of the first cell, the first blocking member and the first detection portion being disposed opposite to each other. The first adhesive member bonds the first detection portion to the main body of the first cell.

[0022] The present application provides a battery pack, comprising a housing and a battery module according to any one of the above embodiments, wherein the battery module is located inside the housing.

[0023] The present application provides an electrical device, comprising a battery module in any one of the above embodiments.

[0024] The battery module, battery pack and electrical equipment of the present application limit the position of the first detection part by setting a first blocking member, and the first adhesive member bonds the first detection part to the cell shell of the first battery cell, which facilitates the installation of the first detection part on the main body of the first battery cell and improves the detection accuracy of the first detection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a battery module in some embodiments is shown.

[0026] Figure 2 A schematic structural diagram of a battery module from another perspective in some embodiments is shown.

[0027] Figure 3 Some embodiments are shown Figure 2 A magnified schematic diagram of the middle part of the structure.

[0028] Figure 4 Schematic diagrams of the structures of some battery modules in some embodiments are shown.

[0029] Figure 5 Schematic diagrams of the structures of some battery modules in some embodiments are shown.

[0030] Figure 6 Schematic diagrams of the structures of battery cells in some embodiments are shown.

[0031] Figure 7 Schematic diagrams of the structures of some battery modules in other embodiments are shown.

[0032] Figure 8 Schematic diagrams of the structures of some battery modules in other embodiments are shown.

[0033] Fig. 9 A schematic diagram of the structure of a battery pack in some embodiments is shown.

[0034] Fig.10 An exploded schematic diagram of a battery pack in some embodiments is shown.

[0035] Fig.11 A schematic flow chart of a method for manufacturing a battery module in some embodiments is shown.

[0036] Fig.12 A schematic diagram of the structure of electrical equipment in some embodiments is shown.

[0037] Description of main component symbols: Battery module 100 Battery cell assembly 10 Battery 11 The first battery cell 11a The second battery cell 11b Battery cell housing 111 First Wall 1111 Main body 111a Sealing portion 111b Shell top wall 1101 Electrode terminal 112 First electrode terminal 112a1 First negative terminal 112a2 Second electrode terminal 112b2 Second positive terminal 112b1 The first buffer member 20 The first stopper 30 Part 131 Part 232 First detection member 40 First detection unit 41 First conductor 42 First adhesive member 50 First circuit board 60 Opening 60a Conductive sheet 61 First conductive sheet 611 The second conductive sheet 612 The third conductive sheet 613 Radiator 90 Cooling channel 91 The first battery cell group 101 The second battery cell group 102 Battery Pack 1000 Shell 300 Housing opening 301a First side wall 301 Second side wall 302 The third side wall 303 Fourth side wall 304 Bottom wall 305 Top cover 306 Second circuit board 400 Electrical Equipment 2000 First direction X Second direction Y The third direction Z The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0039] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0041] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state between the two components that is approximately perpendicular or equal. For example, in combination with numerical descriptions, perpendicularity may refer to the angle between two straight lines being in the range of 90°±10°, perpendicularity may also refer to the dihedral angle between two planes being in the range of 90°±10°, and perpendicularity may refer to the angle between a straight line and a plane being in the range of 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0042] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components may be approximately parallel. For example, combined with numerical descriptions, parallel can refer to the angle between two straight lines being between 180°±10°, parallel can also refer to the dihedral angle between two planes being between 180°±10°, and parallel can refer to the angle between a straight line and a plane being between 180°±10°. The two components described as "parallel" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0043] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0044] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] See also Figures 1 to 7 The first embodiment of the present application provides a battery module 100, including a battery cell assembly 10, wherein the battery cell assembly 10 includes a plurality of battery cells 11. The battery cell 11 includes a battery cell housing 111 and an electrode assembly (not shown). The battery cell housing 111 includes a main body 111a, and the electrode assembly is disposed in the main body 111a.

[0046] In some embodiments, the plurality of battery cells 11 are stacked along a first direction X. The first direction X is a thickness direction of the battery cell 11 .

[0047] In some embodiments, the electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet, and the separator is disposed between the positive electrode sheet and the negative electrode sheet.

[0048] In some embodiments, the plurality of battery cells 11 include adjacent first battery cells 11a and second battery cells 11b. Optionally, the second battery cells 11b and the first battery cells 11a are arranged along the first direction X.

[0049] In some embodiments, the first battery cell 11a is the middle battery cell, and the battery cell near the middle usually has a higher temperature. For example, the battery cell assembly 10 includes 7 battery cells, and the first battery cell 11a can be the 4th battery cell. For example, the battery cell assembly 10 includes 6 battery cells, and the first battery cell 11a can be the 3rd battery cell or the 4th battery cell.

[0050] In some embodiments, the battery module 100 includes a first buffer 20, which is located between the main body 111a of the first battery cell 11a and the main body 111a of the second battery cell 11b to provide expansion space for the multiple battery cells 11. Optionally, the first buffer 20 includes foam.

[0051] In some embodiments, the battery module 100 includes a first blocking member 30, the first blocking member 30 is connected to the main body 111a of the first battery cell 11a, the first blocking member 30 includes a first portion 31 and a second portion 32, the first portion 31 is located between the first battery cell 11a and the second battery cell 11b, and the second portion 32 extends out of the main body 111a of the first battery cell 11a and the main body 111a of the second battery cell 11b. Optionally, the first blocking member 30 includes foam.

[0052] In some embodiments, the first blocking member 30 is in contact with the main body 111 a of the first battery cell 11 a . In other embodiments, the first blocking member 30 is in adhesive connection with the main body 111 a of the first battery cell 11 a .

[0053] In some embodiments, the battery module 100 includes a first detection member 40, the first detection member 40 includes a first detection portion 41 disposed on the main body 111a of the first battery cell 11a, and the second portion 32 is disposed opposite to the first detection portion 41. Optionally, the first detection member 40 includes a negative temperature coefficient thermistor.

[0054] In some embodiments, the battery module 100 includes a first adhesive 50, the first adhesive 50 is bonded to the first detection portion 41 and the main body 111a of the first battery cell 11a, and the first adhesive 50 is separated from the second battery cell 11b. The first adhesive 50 is configured to be formed by placing a first insulating material on the outer side of the first detection portion 41 and then curing it. By setting the first blocking member 30 to limit the position of the first adhesive member 50, the first adhesive member 50 bonds the first detection unit 41 to the cell housing 111 of the first cell 11a, making it easier to install the first detection unit 41 on the main body 111a of the first cell 11a, thereby improving the detection accuracy of the first detection unit 41.

[0055] In some embodiments, the first adhesive member 50 is configured to be formed by placing a first insulating material on the outer side of the first detection portion 41 and then curing the first insulating material.

[0056] The first blocking member 30 limits the first adhesive member 50 from flowing between the main body 111a of the first battery cell 11a and the main body 111a of the second battery cell 11b before curing, thereby reducing the effect of the first blocking member 30 on the expansion of the first battery cell 11a and the second battery cell 11b. Optionally, the first adhesive member 50 includes glue.

[0057] In some embodiments, the first adhesive 50 includes thermally conductive adhesive, which helps the thermally conductive adhesive transfer the heat of the battery cell 11 to the first detection unit 41 , thereby improving the accuracy of the temperature collected by the first detection unit 41 .

[0058] In some embodiments, the thermal conductivity of the thermal conductive adhesive is 0.8 W / (m·K)-2 W / (m·K), which is beneficial for the thermal conductive adhesive to transfer the heat of the battery cell 11 to the first detection unit 41 .

[0059] Optionally, the thermal conductivity of the thermal conductive adhesive can be any one of 0.8W / (m·K), 0.9W / (m·K), 1.0W / (m·K), 1.1W / (m·K), 1.2W / (m·K), 1.3W / (m·K), 1.4W / (m·K), 1.5W / (m·K), 1.6W / (m·K), 1.7W / (m·K), 1.8W / (m·K), 1.9W / (m·K), and 2.0W / (m·K), or a range consisting of any two of them.

[0060] In some embodiments, the first adhesive 50 covers the first detection portion 41 , which is beneficial for fixing the first detection portion 41 and improving the accuracy of the temperature collected by the first detection portion 41 .

[0061] 09-In some embodiments, the first detection unit 41 is configured to detect the temperature of the first battery cell 11a. In other embodiments, the first detection unit 41 may be configured to detect other data of the first battery cell 11a, such as current, voltage, resistance, electrolyte, moisture, etc. This application takes the detection of the temperature of the first battery cell 11a as an example for explanation.

[0062] In some embodiments, the first detection unit 41 includes a temperature detection element, which can sense temperature and convert it into a usable output signal. Optionally, the temperature detection element includes a temperature sensor.

[0063] See also Figure 6 In some embodiments, the battery cell housing 111 includes a sealing portion 111b, and the sealing portion 111b is connected to the main body portion 111a. Along the first direction X, the first detection portion 41 is located between the second portion 32 and the sealing portion 111b of the first battery cell 11a.

[0064] See also Figure 4 In some embodiments, the main body 111 a includes a shell top wall 1101 , the sealing portion 111 b is connected to the shell top wall 1101 , and the first adhesive 50 is bonded to the first detection portion 41 and the shell top wall 1101 .

[0065] See also Figure 3 In some embodiments, the main body 111a of the first battery cell 11a includes a first wall 1111 connected to the first buffer member 20. Along the first direction X, a distance d1 between the first detection portion 41 and the sealing portion 111b of the first battery cell 11a is greater than a distance d2 between the first detection portion 41 and the first wall 1111, so that the first detection portion 41 is closer to the first wall 1111, which is beneficial to improving the accuracy of the first detection portion 41 in detecting the temperature of the main body of the battery cell 11.

[0066] See also Figure 3 In some embodiments, the battery cell 11 includes an electrode terminal 112, which is connected to the electrode assembly and extends from the sealing portion 111b to the battery cell housing 111. Along the first direction X, the projection of the first detection portion 41 overlaps with the projection of the electrode terminal 112. The temperature at the location of the electrode terminal 112 is higher, which facilitates the first detection portion 41 to better detect the temperature of the battery cell 11.

[0067] In some embodiments, the first adhesive 50 bonds the first detection part 41 , the main body 111a of the first battery cell 11a , and the first blocking member 30 , further facilitating installation of the first detection part 41 on the surface of the battery case 111 of the first battery cell 11a , thereby facilitating fixing the first detection part 41 .

[0068] In some embodiments, the Shore hardness C of the first barrier 30 is less than or equal to the Shore hardness C of the first buffer 20 . When the battery cell 11 expands, the second portion 32 can be compressed together with the first buffer 20 , reducing the effect of the first barrier 30 on the expansion of the battery cell 11 .

[0069] In some embodiments, when the Shore hardness C of the first barrier 30 is less than the Shore hardness C of the first buffer 20 , the difference between the Shore hardness C of the first buffer 20 and the Shore hardness C of the first barrier 30 is greater than 10, further reducing the effect of the first barrier 30 on the expansion of the battery cell 11 .

[0070] In some embodiments, the first blocking member 30 is compressed between the main body 111a of the first battery cell 11a and the main body 111a of the second battery cell 11b, so that the first blocking member 30 has an interference fit with the first battery cell 11a and the second battery cell 11b, which helps to reduce the movement of the first blocking member 30.

[0071] In some embodiments, the first blocking member 30 is bonded to the first buffer member 20 , which helps to reduce the movement of the first blocking member 30 .

[0072] In some embodiments, the first blocking member 30 is bonded to the main body 111 a of the first battery cell 11 a and the first buffer member 20 , which further helps to reduce the movement of the first blocking member 30 .

[0073] In some embodiments, the first blocking member 30 is bonded to the main body 111 a of the second battery cell 11 b and the first buffer member 20 , which further helps to reduce the movement of the first blocking member 30 .

[0074] In some embodiments, the first blocking member 30 is bonded to the main body 111 a of the first battery cell 11 a , the main body 111 a of the second battery cell 11 b , and the first buffer member 20 , which further helps to reduce the movement of the first blocking member 30 .

[0075] See also Figure 4 In some embodiments, along the first direction X, the projection of the second portion 32 covers the projection of the first detection portion 41 , and the first blocking member 30 reduces overflow of the first adhesive member 50 .

[0076] See also Figure 2 and Figure 3 In some embodiments, the battery module 100 includes a first circuit board 60 , and the first circuit board 60 and the main body 111 a are arranged along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0077] In some embodiments, the first detecting member 40 includes a first wire 42 , and the first wire 42 connects the first detecting portion 41 and the first circuit board 60 .

[0078] In some embodiments, the first circuit board 60 is provided with a plurality of conductive sheets 61 , the plurality of conductive sheets 61 include a first conductive sheet 611 and a second conductive sheet 612 , and the second conductive sheet 612 and the first conductive sheet 611 are arranged along the first direction X.

[0079] In some embodiments, the first battery cell 11a includes a first electrode terminal 112a1, and the first electrode terminal 112a is bent and connected to the first conductive sheet 611. Optionally, the first electrode terminal 112a1 is bent and welded to the first conductive sheet 611. Optionally, the welding method includes but is not limited to laser welding, ultrasonic welding, etc.

[0080] In some embodiments, the second battery cell 11b includes a second electrode terminal 112b2, and the second electrode terminal 112b is bent and connected to the second conductive sheet 612. Optionally, the second electrode terminal 112b2 is bent and welded to the second conductive sheet 612. Optionally, the welding method includes laser welding, ultrasonic welding, etc.

[0081] In some embodiments, adjacent battery cells 11 are connected to the same conductive sheet 61 to achieve series connection between adjacent battery cells 11 .

[0082] See also Figure 2 and Figure 6 Each battery cell 11 includes two electrode terminals 112, and the two electrode terminals 112 are located on the same side of the battery cell 11, one of the electrode terminals 112 is a positive terminal, and the other electrode terminal 112 is a negative terminal. Taking the first electrode terminal 112a1 as the first positive terminal and the second electrode terminal 112b2 as the second negative terminal as an example, the other electrode terminal 112 of the first battery cell 11a is defined as the first negative terminal 112a2, and the other electrode terminal 112 of the second battery cell 11 is defined as the second positive terminal 112b1.

[0083] In some embodiments, the plurality of conductive sheets 61 include a third conductive sheet 613, the first positive terminal 112a1 is bent and connected to the first conductive sheet 611, the second negative terminal 112b2 is bent and connected to the second conductive sheet 612, and the first negative terminal 112a2 and the second positive terminal 112b1 are bent and connected to the third conductive sheet 613, so that the first battery cell 11a and the second battery cell 11b are connected in series. In other embodiments, the first battery cell 11a and the second battery cell 11b are arranged in parallel.

[0084] In some embodiments, the first circuit board 60 includes at least one opening 60a, and the opening 60a penetrates the first circuit board 60 along the second direction Y. The first electrode terminal 112a1, the second electrode terminal 112b2, and the first wire 42 pass through the same opening 60a for easy assembly.

[0085] In some embodiments, the projection of the area where the first electrode terminal 112a1 and the first conductive sheet 611 are connected along the second direction Y is separated from the projection of the first circuit board 60 along the second direction Y, and the first circuit board 60 does not extend below the first electrode terminal 112a1, which facilitates the connection between the first electrode terminal 112a and the first conductive sheet 611.

[0086] In some embodiments, the projection of the area where the second electrode terminal 112b2 and the second conductive sheet 612 are connected along the second direction Y is separated from the projection of the first circuit board 60 along the second direction Y, and the first circuit board 60 does not extend below the second electrode terminal 112b2, which facilitates the connection between the second electrode terminal 112b and the second conductive sheet 612 and facilitates assembly, which is beneficial to improving assembly efficiency.

[0087] In some embodiments, along the first direction X, the projection of the first detection portion 41 along the second direction Y is located between the projection of the first electrode terminal 112a along the second direction Y and the projection of the second electrode terminal 112b along the second direction Y, and the first detection portion 41 is exposed in the opening 60a, which facilitates the installation of the first detection portion 41 and makes the position of the first detection portion 41 more accurate.

[0088] Optionally, the first circuit board 60 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0089] Optionally, the first circuit board 60 includes a flexible printed circuit (FPC). Optionally, the first circuit board 60 includes a printed circuit board (PCB).

[0090] See also Fig.11 The present application provides a method for manufacturing the battery module 100 in any one of the above embodiments, comprising the following steps: Step 1: placing the first buffer member 20 between the first battery cell 11 a and the second battery cell 11 b ; Step 2: Place the first blocking member 30 between the first battery cell 11a and the second battery cell 11b, so that the first portion 31 is located between the first battery cell 11a and the second battery cell 11b, and the second portion 32 extends out of the main body 111a of the first battery cell 11a and the main body 111a of the second battery cell 11b; Step 3: placing the first detection unit 41 on the main body 111 a of the first battery cell 11 a; Step 4: Use the first adhesive member 50 to bond the first detection unit 41 and the main body 111 a of the first battery cell 11 a .

[0091] In some embodiments, step 2 specifically includes: placing the first blocking member 30 between the first battery cell 11 a and the second battery cell 11 b so that the first portion 31 is compressed between the first battery cell 11 a and the second battery cell 11 b .

[0092] In some embodiments, step 2 includes: connecting the first portion 31 to the first buffer 20, limiting the first portion 31 by the first buffer 20, and bonding the first portion 31 to at least one of the first buffer 20, the main body 111a of the first battery cell 11a, and the main body 111a of the second battery cell 11b.

[0093] In some embodiments, step 3 specifically includes: placing the first detection portion 41 on the main body 111 a of the first battery cell 11 a , making the first detection portion 41 as close to the first wall 1111 as possible, and making the first detection portion 41 not exceed the first blocking member 30 .

[0094] In some embodiments, step 4 specifically includes: setting the first adhesive 50 through the opening 50a, immersing the first detection part 41 in the first adhesive 50, and bonding it to the main body 111a of the first battery cell 11a; or setting the first adhesive 50 through the opening 50a, immersing the first detection part 41 in the first adhesive 50, and bonding the first adhesive 50 to the first detection part 41, the battery cell case 111 of the first battery cell 11a and the first blocking member 30.

[0095] See also Figure 7 and Figure 8 In the second embodiment of the present application, a battery module 200 is provided, which is different from the battery module 100 in the first embodiment in that: the first battery cell 10a is one of the battery cells 11 located at the outermost side along the first direction X among the multiple battery cells 11. The battery module 200 includes a first buffer member 20, the first buffer member 20 is connected to the first wall 1111 of the first battery cell 11a, and the first wall 1111 is a side wall of the main body 111a of the first battery cell 11a away from the main body 111a of other battery cells 11. The first blocking member 30 is connected to the first buffer member 20. The first detection member 40 includes a first detection portion 41 provided on the main body 111a of the first battery cell 11a, and the first blocking member 30 and the first detection portion 41 are arranged opposite to each other. The first adhesive member 50 bonds the first detection portion 41 to the main body 111a of the first battery cell 11a.

[0096] The first blocking member 30 limits the first adhesive 50 from flowing into between the first wall 1111 and the first buffer member 20 before curing, thereby reducing the influence of the first blocking member 30 on the expansion of the first battery cell 11 a .

[0097] In some embodiments, the Shore hardness C of the first barrier 30 is less than or equal to the Shore hardness C of the first buffer 20 . When the battery cell 11 expands, the first barrier 30 can be compressed together with the first buffer 20 , reducing the effect of the first barrier 30 on the expansion of the battery cell 11 .

[0098] The manufacturing method of the battery module 200 comprises the following steps: Step 1: Connect the first buffer member 20 to the first wall 1111 of the first battery cell 10a; Step: 2: Connect the first blocking member 30 to the first buffer member 20; Step 3: placing the first detection unit 41 on the main body 111 a of the first battery cell 11 a; Step 4: Use the first adhesive member 50 to bond the first detection unit 41 and the main body 111 a of the first battery cell 11 a .

[0099] See also Fig. 9 and Fig.10 An embodiment of the present application provides a battery pack 1000, including a housing 300, wherein the housing 300 is provided with a receiving space, and the battery module 100 or the battery module 200 is located in the receiving space.

[0100] In some embodiments, the first buffer member 20 is located between the first battery cell 11 a and the housing 300 .

[0101] In some embodiments, the housing 300 includes a first side wall 301, a second side wall 302, a third side wall 303, a fourth side wall 304, a bottom wall 305, and a top cover 306. The first side wall 301 and the second side wall 302 are arranged along a first direction X, the top cover 306 and the bottom wall 305 are arranged along a second direction Y, and the third side wall 303 and the fourth side wall 304 are arranged along a third direction Z. The first side wall 301 connects the third side wall 303 and the fourth side wall 304, the second side wall 302 connects the third side wall 303 and the fourth side wall 304, the bottom wall 305 connects the first side wall 301, the second side wall 302, the third side wall 303, and the fourth side wall 304, and the top cover 306 connects the first side wall 301, the second side wall 302, the third side wall 303, and the fourth side wall 304 to form a receiving space. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0102] In some embodiments, the first buffer member 20 is located between the first side wall 301 and the first battery cell 10 a . The first buffer member 20 includes foam and provides expansion space for the battery cell 11 .

[0103] In some embodiments, the first buffer 20 is located between the first battery core 10 a and the second side wall 302 .

[0104] In some embodiments, the heat dissipation channel 91 is connected to the outside through the housing opening 301 a on the first side wall 301 and the second side wall 302 .

[0105] In some embodiments, the battery pack 1000 includes a second circuit board 400 , and the conductive component 130 is connected to the second circuit board 400 .

[0106] The second circuit board 400 includes a BMS component (Battery Management System), which includes a plurality of electronic components. The plurality of electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 11 .

[0107] Optionally, the second circuit board 400 includes a flexible printed circuit (FPC). Optionally, the second circuit board 400 includes a printed circuit board (PCB).

[0108] See also Fig.12 The present application provides an electric device 2000 using the above-mentioned battery pack 1000. In one embodiment, the electric device 2000 of the present application may be, but is not limited to, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household battery modules, etc.

[0109] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells, wherein the battery cells comprise a battery cell housing and an electrode assembly, the battery cell housing comprises a main body, the electrode assembly is disposed on the main body, and the plurality of battery cells comprise adjacent first and second battery cells; A first buffer member is located between the main body of the first battery cell and the main body of the second battery cell; A first blocking member connected to the main body of the first battery cell, the first blocking member comprising a first portion and a second portion, the first portion being located between the first battery cell and the second battery cell, and the second portion extending out of the main body of the first battery cell and the main body of the second battery cell; A first detection member includes a first detection portion provided on a main body of the first battery cell, and the second portion is provided opposite to the first detection portion; The first adhesive member is used to bond the first detection part and the main body of the first battery cell, and the first adhesive member is separated from the second battery cell.

2. The battery module according to claim 1, characterized in that: The first adhesive member bonds the first detection portion, the main body of the first battery cell, and the first blocking member.

3. The battery module according to claim 1 or 2, characterized in that: The Shore hardness C of the first blocking member is less than or equal to the Shore hardness C of the first buffer member.

4. The battery module according to any one of claims 1 to 3, characterized in that: The battery cell includes an electrode terminal, the battery cell housing includes a sealing portion connected to the main body, the electrode terminal is connected to the electrode assembly and extends from the sealing portion to the battery cell housing; Along a first direction, the first detection portion is located between the second portion and the sealing portion of the first battery cell. Along the first direction, a projection of the first detection portion overlaps with a projection of the electrode terminal. The first direction is a thickness direction of the battery cell.

5. The battery module according to claim 4, characterized in that: The main body of the first battery cell includes a first wall connected to the first buffer member, and along the first direction, a distance between the first detection portion and a sealing portion of the first battery cell is greater than a distance between the first detection portion and the first wall.

6. The battery module according to any one of claims 1 to 5, characterized in that: The first blocking member is bonded to the first buffer member.

7. The battery module according to any one of claims 1 to 6, characterized in that: The second battery cell and the first battery cell are arranged along a first direction, and along the first direction, a projection of the second portion covers a projection of the first detection portion.

8. The battery module according to claim 4, characterized in that: The battery module comprises a first circuit board, the first circuit board and the main body are arranged along a second direction, the first circuit board comprises at least one opening, and the opening penetrates the first circuit board along the second direction; The first circuit board is provided with a plurality of conductive sheets, and the plurality of conductive sheets include a first conductive sheet and a second conductive sheet; The first battery cell includes a first electrode terminal connected to the first conductive sheet, the second battery cell includes a second electrode terminal connected to the second conductive sheet, the first detection member includes a first wire, the first electrode terminal, the second electrode terminal, and the first wire pass through the same opening, and the first wire is connected to the first circuit board.

9. The battery module according to any one of claims 1 to 8, characterized in that: The first detection unit is a temperature detection member.

10. The battery module according to any one of claims 1 to 9, characterized in that: The first adhesive member is configured by placing a first insulating material on the outer side of the first detection portion and then curing the first insulating material.

11. The battery module according to any one of claims 1 to 10, characterized in that: The first adhesive member includes glue.

12. A method for manufacturing a battery module according to any one of claims 1 to 11, characterized in that: The following steps are involved: placing the first buffer member between the first battery core and the second battery core; Placing the first blocking member between the first battery core and the second battery core, so that the first portion is located between the first battery core and the second battery core, and the second portion extends out of the main body of the first battery core and the main body of the second battery core; placing the first detection unit on the main body of the first battery cell; The first adhesive member is used to bond the first detection portion and the main body portion of the first battery cell.

13. A battery module, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells, each of the battery cells comprising a battery cell shell and an electrode assembly, the battery cell shell comprising a main body, the electrode assembly being arranged on the main body, and the plurality of battery cells comprising a first battery cell located at the outermost side; A first buffer member connected to a first wall of the first battery cell, wherein the first wall is a side wall of a main body of the first battery cell away from main bodies of other battery cells; A first blocking member connected to the first buffer member; A first detection member, comprising a first detection portion provided on a main body of the first battery core, wherein the first blocking member and the first detection portion are arranged opposite to each other; The first adhesive member is used to bond the first detection unit and the main body of the first battery cell.

14. A battery pack, characterized in that: The invention comprises a housing and a battery module according to any one of claims 1 to 11 or claim 13, wherein the battery module is located in the housing.

15. An electrical equipment, characterized in that: Comprising a battery module as claimed in any one of claims 1 to 11 or claim 13.

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