Battery cell assembly and battery pack

Abstract

The utility model discloses a battery cell assembly and a battery pack, the battery cell assembly comprises a battery cell body, a battery cell pole column group, a battery cell connecting piece, a battery cell connecting piece, a battery cell connecting piece and a battery cell connecting piece, wherein any surface of the battery cell body is provided with a battery cell pole column group; and the data acquisition module is mounted on the battery cell body and electrically connected with the battery cell pole column group, and the data acquisition module is used for monitoring parameters of the battery cell body. The data acquisition module is integrated on the battery cell body, the parameters of the battery cell body are acquired by the data acquisition module, and the health state of the battery can be determined according to the parameters acquired by the data acquisition module, so that whether the battery cell body is abnormal or not is judged, the problem of the battery cell body can be found in time, and potential safety hazards are reduced; therefore, the safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, especially relates to a battery cell assembly and battery pack. BACKGROUND

[0002] The battery pack usually includes a plurality of battery cells in series or parallel to increase the power of the battery pack.

[0003] However, due to the safety problem of easy thermal runaway of the battery cell leading to fire and explosion, the battery pack with a large number of battery cells has great safety hazards.

[0004] In order to monitor the battery pack, the battery management system usually further includes a safety system, such as a fire control system, a smoke detector or a temperature controller, to detect the safe operation of the battery pack.

[0005] However, the monitoring of the safety system may have the problem of alarm lag, which seriously affects the safety of the battery pack.

[0006] Therefore, how to provide a battery cell assembly to monitor the health status of the battery cell body, to timely find out the problem of the battery cell body, to reduce the safety hazard, and to improve the safety of the battery pack, is a technical problem to be solved by the skilled in the art. UTILITY MODEL CONTENT

[0007] Therefore, the utility model provides a battery cell assembly to monitor the health status of the battery cell body, to timely find out the problem of the battery cell body, to reduce the safety hazard, and to improve the safety of the battery pack. In addition, the utility model also provides a battery pack with the above-mentioned battery cell assembly.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] A battery cell assembly, comprising:

[0010] A battery cell body, any face of the battery cell body is provided with a positive electrode cell pole and a negative electrode cell pole;

[0011] A data acquisition module, the data acquisition module is installed on the battery cell body and is arranged between the positive electrode cell pole and the negative electrode cell pole, and is electrically connected with the positive electrode cell pole and the negative electrode cell pole, and the data acquisition module is used for monitoring the parameters of the battery cell body.

[0012] Preferably, the data acquisition module and the positive electrode cell pole are electrically connected by a pressure contact connection contact assembly, and the data acquisition module and the negative electrode cell pole are also electrically connected by a pressure contact connection contact assembly.

[0013] Preferably, the contact assembly of the above-mentioned battery cell assembly comprises a contact spring and a contact point, which can be crimped and connected and electrically connected;

[0014] One of the positive electrode cell pole and the data acquisition module is provided with the contact spring, and the other is provided with the contact point;

[0015] One of the data acquisition module and the negative electrode cell pole is provided with the contact spring, and the other is provided with the contact point.

[0016] Preferably, the above-mentioned battery cell assembly, the pressure relief valve is arranged between the positive electrode cell pole and the negative electrode cell pole, the data acquisition module has a avoiding hole opposite to the pressure relief valve, the avoiding hole penetrates along the thickness direction of the data acquisition module;

[0017] The thickness direction is the arrangement direction of the battery cell body and the data acquisition module.

[0018] Preferably, the above-mentioned battery cell assembly, the first temperature acquisition module is arranged in the avoiding hole, and the first temperature acquisition module is used for detecting the temperature in the avoiding hole.

[0019] Preferably, the above-mentioned battery cell assembly, the shell of the data acquisition module is a high-temperature-resistant protective shell.

[0020] Preferably, the above-mentioned battery cell assembly further comprises:

[0021] The pressure acquisition device is used for detecting the pressure data of the pressure generated by the battery cell body to the pressure acquisition device, and the data acquisition module is electrically connected with the pressure acquisition device, and is used for acquiring the pressure data detected by the pressure acquisition device.

[0022] Preferably, the above-mentioned battery cell assembly, the battery cell body is a rectangular battery cell, and the pressure acquisition device is arranged on the first side face or the second side face with the largest area in the battery cell body, and the first side face is opposite to the second side face.

[0023] Preferably, the above-mentioned battery cell assembly, the pressure acquisition device is provided with a first signal plug near one side of the data acquisition module, and the data acquisition module is provided with a second signal plug;

[0024] The first signal plug and the second signal plug can be plugged to realize the electrical connection between the pressure acquisition device and the data acquisition module.

[0025] Preferably, the above-mentioned battery cell assembly, the pressure acquisition device is integrated with a second temperature acquisition module, and the second temperature acquisition module is used for detecting the temperature of the surface of the battery cell body.

[0026] A battery pack comprising a plurality of electrically connected cell assemblies, the cell assemblies being any of the above described cell assemblies.

[0027] Preferably, the battery pack described above, the data acquisition module of the cell assembly is integrated with the equalization circuit;

[0028] The data acquisition modules of adjacent cell assemblies are sequentially plugged in to achieve electrical connection between the equalization circuits of adjacent cell assemblies.

[0029] Preferably, the battery pack described above, the equalization circuit is a DC / DC module.

[0030] Preferably, the battery pack described above, the data acquisition module of the cell assembly is integrated with a passive equalization circuit, which can be connected in parallel with the cell body of the cell assembly.

[0031] Preferably, the battery pack described above, the data acquisition module of the cell assembly transmits data through a wiring harness data communication mode or through an integrated wireless communication module.

[0032] The utility model discloses a kind of cell assemblies, data acquisition module is integrated on cell body, and the parameter of cell body is collected using data acquisition module, the health status of battery can be determined according to the parameter collected by data acquisition module, to determine whether there is abnormality in cell body, i.e. cell body problem can be found in time, to reduce security risk, to improve the safety of battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0034] Figure 1 It is the structural schematic view of cell assembly disclosed in the embodiments of the utility model;

[0035] Figure 2 It is the split view of cell assembly disclosed in the embodiments of the utility model;

[0036] Figure 3 It is the front view of part of structure of cell assembly disclosed in the embodiments of the utility model;

[0037] Figure 4 It is Figure 3 Local enlarged view of A in the middle;

[0038] Figure 5 It is the structural schematic view of the electric core body of the electric core assembly disclosed in the embodiment of the utility model;

[0039] Figure 6 It is the structural schematic view of the data acquisition module of the electric core assembly disclosed in the embodiment of the utility model;

[0040] Figure 7 It is the structural schematic view of the data acquisition module of the electric core assembly disclosed in the embodiment of the utility model; Figure 6 It is the partial enlarged view of B in the middle;

[0041] Figure 8 It is the structural schematic view of the data acquisition module of the electric core assembly disclosed in the embodiment of the utility model in another direction;

[0042] Figure 9 It is the structural schematic view of the pressure acquisition device of the electric core assembly disclosed in the embodiment of the utility model;

[0043] Figure 10 It is the structural schematic view of the pressure acquisition device of the electric core assembly disclosed in the embodiment of the utility model; Figure 9 It is the partial enlarged view of C in the middle;

[0044] Figure 11 It is the functional principle diagram of the electric core assembly disclosed in the embodiment of the utility model;

[0045] Figure 12 It is the connection diagram of the battery pack disclosed in the embodiment of the utility model;

[0046] Figure 13 It is the principle diagram of the active equalization of the battery pack disclosed in the embodiment of the utility model;

[0047] Figure 14 It is another structural schematic view of the data acquisition module disclosed in the embodiment of the utility model;

[0048] Figure 15 It is the schematic view of the wiring harness data communication mode of the battery pack disclosed in the embodiment of the utility model;

[0049] Figure 16 It is the schematic view of the wireless communication mode of the battery pack disclosed in the embodiment of the utility model. DETAILED DESCRIPTION

[0050] The utility model discloses a kind of electric core assemblies, the health state of electric core body is monitored, can find the problem of electric core body in time, to reduce security risk, to improve the safety of battery pack.In addition, the utility model also discloses a kind of battery pack with the above electric core assembly.

[0051] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0052] Hereinafter, the terms "first" and "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features.

[0053] A battery energy storage station is a facility that can store and release electrical energy, mainly using battery technology to convert electrical energy into chemical energy for storage, and convert chemical energy back into electrical energy when needed to provide stable power supply. The basic working principle of the battery energy storage station is to convert electrical energy into chemical energy and convert chemical energy back into electrical energy when needed, thereby providing power during peak power demand.

[0054] The battery energy storage station usually includes a battery pack, which mainly includes a plurality of battery cells connected in series or parallel.

[0055] However, due to the safety problem of easy thermal runaway of the battery cell leading to fire, combustion or even explosion, the battery energy storage station with a large number of battery cells has a great safety hazard.

[0056] In order to monitor the battery pack, the battery energy storage station usually further includes a safety system, such as a fire control system, a smoke detector or a temperature controller, etc., to detect the safe operation of the battery pack.

[0057] However, due to the large space of the battery energy storage station and the object monitored by the above-mentioned safety system being the battery pack, the monitoring of the above-mentioned safety system has the problem of alarm lag, which seriously affects the safety of the battery pack.

[0058] Based on this, a battery cell assembly is disclosed in the present application to monitor the health status of the battery cell body, thereby discovering problems of the battery cell body in time, thereby reducing safety hazards, and improving the safety of the battery pack.

[0059] As shown in Figure 1 and Figure 2 The battery cell assembly 100 includes a battery cell body 1, an insulation protection piece 2 and a data acquisition module 3.

[0060] The cell body 1 is a core component for energy storage, and generally includes a cell pole group 11. The cell pole group 11 is a part of the cell body 1 for connecting with a power utilization structure. For example, the cell pole group 11 includes a positive cell pole 111 and a negative cell pole 112. In some embodiments, the positive cell pole 111 and the negative cell pole 112 are arranged on the same side of the cell body 1, and have a distance therebetween.

[0061] The insulation protection 2 is sleeved on the outside of the cell body 1. For example, the insulation protection 2 includes, but is not limited to, a blue film. The blue film is a plastic film, which is generally made of a PET substrate plus PSA pressure-sensitive adhesive. The blue film can prevent the shell of the cell body 1 from contacting the external environment, thereby avoiding pollution or corrosion of the shell of the cell body 1. The blue film can also provide an additional insulation layer for the cell body 1, thereby reducing the risk of short circuit between the cell body 1 and other components. In addition, the blue film can also increase the mechanical strength of the cell body 1, thereby improving the anti-extrusion and anti-vibration capabilities, and further ensuring the safety and stability of the battery.

[0062] The data acquisition module 3 is installed on the cell body 1 and electrically connected with the positive cell pole 111 and the negative cell pole 112. The data acquisition module 3 is used to monitor the parameters of the cell body 1. For example, the parameters of the cell body 1 include, but are not limited to, one or more of the voltage, current, temperature, resistance and thermal runaway state of the cell body 1.

[0063] It can be understood that the cell body 1 in the present application integrates the data acquisition module 3, and uses the data acquisition module 3 to acquire the parameters of the cell body 1. According to the parameters acquired by the data acquisition module 3, the health status of the battery can be determined, so as to determine whether the cell body 1 is abnormal, that is, the problem of the cell body 1 can be found in time, thereby reducing the safety hazard, and improving the safety of the battery energy storage station.

[0064] Specifically, the cell body 1 integrated with the data acquisition module 3 can monitor and record the data changes in the cell body 1 in real time after the cell assembly is offline, and truly realizes the monitoring of the health status of the cell in the whole life cycle. As long as the data of the data acquisition module 3 is imported into the analysis by cooperating with the corresponding detection equipment, the problem of the cell body 1 can be found in time.

[0065] In some embodiments, the data acquisition module 3 is detachably installed on the cell body 1. The connection mode of the data acquisition module 3 and the cell body 1 includes, but is not limited to, clamping, bonding or screw connection. The data acquisition module 3 in the present application is detachably connected with the cell body 1. After the data acquisition module 3 is damaged, the data acquisition module 3 can be replaced, which is conducive to reducing the use cost.

[0066] Referring to Figure 5As shown, the battery cell body 1 herein includes but is not limited to a rectangular battery cell, the battery cell body 1 includes a top surface 101, a first side surface 102 and a first end surface 103, for the convenience of understanding, the top surface 101 is opposite to the bottom surface, the first side surface 102 is opposite to the second side surface, and the first end surface 103 is opposite to the second end surface, thereby forming a rectangular battery cell body 1. In this application, the first side surface 102 is defined as a side with a long side, therefore, the first side surface 102 and the second side surface are the largest surfaces in the rectangular battery cell body 1.

[0067] In combination Figure 2 As can be seen, the insulation protection piece 2 is bonded to the outer side of the first side surface 102, the second side surface, the first end surface 103 and the second end surface of the battery cell body 1. The positive electrode cell post 111 and the negative electrode cell post 112 are both located on the top surface 101, and those skilled in the art can understand that the positive electrode cell post 111 and the negative electrode cell post 112 can be selected to be arranged on other surfaces of the battery cell body 1 according to different needs.

[0068] As Figure 3 shown, one end of the data acquisition module 3 is electrically connected with the positive electrode cell post 111, and the other end is electrically connected with the negative electrode cell post 112, thereby realizing that the data acquisition module 3 operates by taking electricity from the battery cell body 1.

[0069] For example, the data acquisition module 3 and the positive electrode cell post 111, and the data acquisition module 3 and the negative electrode cell post 112 are both electrically connected by the crimping contact assembly 20. It should be noted that the mode of realizing the electrical connection between the data acquisition module 3 and the cell post group 11 can also be wire harness connection and the like.

[0070] In this application, the data acquisition module 3 and the positive electrode cell post 111 and the negative electrode cell post 112 are electrically connected by the contact spring 30 and the contact point 10, the connection mode is simple, and the processing cost is low.

[0071] In combination Figure 3 and Figure 4 As shown, the positive electrode cell post 111 and the negative electrode cell post 112 are both provided with the contact point 10, and the two ends of the data acquisition module 3 are both provided with the contact spring 30.

[0072] The contact point 10 of the positive electrode cell post 111 is crimped and connected with the contact spring 30 of one end of the data acquisition module 3, thereby realizing the electrical connection between the data acquisition module 3 and the positive electrode cell post 111; the contact point 10 of the negative electrode cell post 112 is crimped and connected with the contact spring 30 of the other end of the data acquisition module 3, thereby realizing the electrical connection between the data acquisition module 3 and the negative electrode cell post 112, that is, realizing the electrical connection between the data acquisition module 3 and the battery cell body 1.

[0073] Those skilled in the art will understand that the contact spring 30 can also be disposed on the positive electrode post 111 and the negative electrode post 112, and contact points 10 are disposed at both ends of the data acquisition module 3.

[0074] The following combination Figures 5 to 8 As shown, the mechanical connection between the data acquisition module 3 and the battery cell body 1 is described in detail.

[0075] like Figure 5 As shown, the top surface 101 of the battery cell body 1 is provided with a positive battery cell post 111 and a negative battery cell post 112, and a contact point 10 is provided on the side of the positive battery cell post 111 facing the negative battery cell post 112, and a contact point 10 is also provided on the side of the negative battery cell post 112 facing the positive battery cell post 111.

[0076] Specifically, contact point 10 is a metal conductive contact located on the positive electrode post 111 or the negative electrode post 112 of the battery cell.

[0077] A first slot 13 is provided on the top surface 101. The arrangement and number of the first slots 13 can be set according to different needs, including but not limited to a rectangular arrangement.

[0078] like Figures 6 to 8 As shown, both ends of the data acquisition module 3 are provided with contact springs 30, and one side of the data acquisition module 3 is provided with a first buckle 35.

[0079] The contact spring 30 is a conductive elastic hook structure. For example, the contact spring 30 may have, but is not limited to, having two elastic hook structures. When the contact spring 30 is compressed, it can deform, so that the contact spring 30 can make stable contact with the contact point 10.

[0080] In some embodiments, the data acquisition module 3 is fixedly connected to the cell body 1, that is, the data acquisition module 3 is assembled on the cell body 1 and the electrical connection is achieved by using the crimp contact assembly 20.

[0081] Specifically, when the data acquisition module 3 is assembled and connected to the battery cell body 1, the first buckle 35 of the data acquisition module 3 is engaged in the first slot 13 of the battery cell body 1, thereby enabling the data acquisition module 3 to be engaged on the top surface 101 of the battery cell body 1.

[0082] For example, the first buckle 35 is a plastic part and is capable of elastic deformation. During the process of inserting the first buckle 35 into the first slot 13, the diameter of the first buckle 35 is reduced by compression. After entering the first slot 13, the first buckle 35 will abut against the first slot 13 under the action of restoring force, so as to realize the engagement between the first buckle 35 and the first slot 13.

[0083] In an optional embodiment, the first slot 13 is a stepped slot, and the diameter of the section near the slot opening is smaller than the diameter of the section near the slot bottom, so that the first buckle 35 can abut against and limit the step surface of the first slot 13.

[0084] The data acquisition module 3 in this application is connected to the battery cell body 1 by a snap-fit ​​connection, which simplifies the connection method, facilitates the rapid assembly of the data acquisition module 3, and makes it easy to replace the data acquisition module 3, thereby reducing maintenance costs.

[0085] like Figure 5 A pressure relief valve 12 is provided on the top surface 101 of the battery cell body 1 shown. The pressure relief valve 12 is located between the positive electrode post 111 and the negative electrode post 112.

[0086] When the battery cell body 1 experiences dangerous conditions such as overpressure, overheating, or overcharging, the pressure relief valve 12 can automatically open and release the gas and heat inside the battery cell body 1, thereby preventing dangerous accidents such as explosions or fires caused by excessive internal pressure. It is understood that the gas ejected from the pressure relief valve 12 is high-temperature gas.

[0087] Since the data acquisition module 3 is installed between the positive electrode post 111 and the negative electrode post 112, in order to ensure that the gas in the pressure relief valve 12 can be stably ejected, such as Figure 6 As shown, the data acquisition module 3 has a clearance hole 31, and this clearance hole 31 extends along the thickness direction of the data acquisition module 3. It should be noted that the thickness direction mentioned in this article refers to the arrangement direction of the battery cell body 1 and the data acquisition module 3. Figure 3 Up and down direction.

[0088] For example, the shape and size of the clearance hole 31 of the data acquisition module 3 are the same as those of the pressure relief valve 12.

[0089] In some embodiments, a first temperature acquisition module 32 is provided inside the clearance hole 31 of the data acquisition module 3. The first temperature acquisition module 32 is, but is not limited to, glued or snapped onto the side wall of the clearance hole 31, and is used to detect the temperature inside the clearance hole 31.

[0090] By detecting the temperature inside the relief hole 31, it is possible to determine whether the pressure relief valve 12 is experiencing a problem with the valve spraying, thereby determining whether thermal runaway has occurred.

[0091] The battery cell body 1 in this application is equipped with a first temperature acquisition module 32, which can monitor the thermal runaway state of the battery cell body 1 and reduce safety hazards.

[0092] In some embodiments, the first temperature acquisition module 32 includes, but is not limited to, a temperature sensor.

[0093] The shell of the data acquisition module 3 in the application is a high-temperature-resistant protective shell. The shell of the data acquisition module 3 is made of high-temperature-resistant material, which can ensure that the high-temperature substances sprayed out after the thermal runaway of the battery core body 1 do not damage the internal circuit of the data acquisition module 3, and ensure the normal use requirements of the data acquisition module 3 in a high-temperature environment.

[0094] The material of the shell of the data acquisition module 3 can be selected according to different needs and is within the protection scope.

[0095] On the basis of the above technical solutions, the battery core assembly 100 disclosed in the application further comprises a pressure acquisition device 4, which is attached to the battery core body 1 and is used for detecting the pressure generated by the battery core body 1 on the pressure acquisition device 4. The data acquisition module 3 is electrically connected or communicatively connected to the pressure acquisition device 4, and is used for acquiring the pressure data detected by the pressure acquisition device 4.

[0096] It should be noted that the pressure data in the application includes but is not limited to pressure values or pressure data cloud maps.

[0097] In the application, the pressure acquisition device 4 is used to detect the pressure generated by the battery core body 1 on the pressure acquisition device 4, so that whether the battery core body 1 deforms can be monitored. The pressure acquisition device 4 is electrically connected or communicatively connected to the data acquisition module 3, and can transmit the pressure data collected by the pressure acquisition device 4 to the data acquisition module 3, so as to realize multi-dimensional monitoring of the battery core body 1, further improve the accuracy of monitoring the battery core body 1, and further reduce the security risks.

[0098] For example, the pressure acquisition device 4 is installed on the first side surface 102 or the second side surface of the battery core body 1, i.e. the pressure acquisition device 4 is installed on the large surface of the battery core body 1, so as to increase the detection area and improve the detection accuracy.

[0099] In an optional embodiment, the pressure acquisition device 4 is adhesively connected to the first side surface 102 of the battery core body 1.

[0100] The structure and connection relationship of the pressure acquisition device 4 will be described below. Figure 2 , Figure 3 and Figures 5 to 10 .

[0101] As shown in Figure 9 , the pressure acquisition device 4 comprises a pressure acquisition device body 41, a first signal plug 42, a connecting plate 43, a second buckle 44 and a second temperature acquisition device 45.

[0102] The pressure acquisition device body 41 is used to be installed on the first side surface 102 of the battery core body 1. Figure 5The pressure sensor body 41 is attached to either the first side 102 or the second side. For example, the pressure sensor body 41 is bonded to either the first side 102 or the second side. Of course, the pressure sensor body 41 can also be detachably connected to the battery cell body 1 using other connection methods. In some embodiments, the pressure sensor body 41 has a flat plate structure and a relatively small thickness.

[0103] The pressure acquisition device 4 has a first signal pair plug-in 42 located on the side near the data acquisition module 3, such as... Figure 8 As shown, the data acquisition module 3 is equipped with a second signal pair plug-in 33.

[0104] The first signal pair plug 42 and the second signal pair plug 33 can be plugged in to achieve an electrical connection between the pressure acquisition device 4 and the data acquisition module 3. For example, the first signal pair plug 42 can be a plug, and the second signal pair plug 33 can be a socket that mates with the plug. It should be noted that the structure of the signal pair plugs involved in this application can refer to existing known structures; any plug structure that can achieve signal transmission is within the scope of protection.

[0105] The pressure acquisition device 4 and the data acquisition module 3 in this application are electrically connected by a signal pair plug-in, which can achieve quick connection and improve assembly efficiency.

[0106] In some embodiments, the first signal pair plug-in 42 is disposed on the connecting plate 43. Optionally, the connecting plate 43 is perpendicular to the plane where the pressure acquisition unit body 41 is located. The first signal pair plug-in 42 is disposed on the side of the connecting plate 43 near the data acquisition module 3, and a second buckle 44 is disposed on the other side of the connecting plate 43.

[0107] like Figure 5 As shown, the top surface 101 of the battery cell body 1 is provided with a second slot 14, and the second buckle 44 can be inserted into the second slot 14 to fix the first signal pair plug 42 on the battery cell body 1. It should be noted that the connection method of the first signal pair plug 42 to the battery cell body 1 can also be adhesive or threaded connection. It can be understood that the connection method that enables the first signal pair plug 42 to be detachably connected to the battery cell body 1 is within the protection scope.

[0108] like Figure 10 As shown, the second snap-fit ​​44 in this application includes: a snap-fit ​​segment 442 and a connecting segment 441.

[0109] The connecting segments 441 are arranged in a circumferential direction and have gaps between adjacent connecting segments 441. The connecting segments 441 are elastic members, and the gaps between the adjacent connecting segments 441 are reduced in size during the insertion of the second buckle 44 into the second clamping groove 14. The connecting segments 441 are connected to the connecting plate 43 of the pressure collector 4. For example, the connecting segments 441 and the connecting plate 43 are connected by welding or are integrally formed.

[0110] The clamping segments 442 correspond to the connecting segments 441 in one-to-one correspondence and are integrally formed. The outer surface of the clamping segment 442 protrudes from the outer surface of the connecting segment 441, so that the circumferential dimension of the outer surface of the clamping segment 442 is greater than the circumferential dimension of the outer surface of the connecting segment 441, so that a stepped surface is formed between the clamping segment 442 and the connecting segment 441.

[0111] During the insertion of the second buckle 44 into the second clamping groove 14, the clamping segment 442 extends into the second clamping groove 14 and is clamped by abutting against the stepped surface of the second clamping groove 14 by the clamping segment 442. It should be noted that the shape of the first buckle 35 is the same as the shape of the second buckle 44.

[0112] The first signal-to-plug-in member 42 of the pressure collector 4 in the application is fixed to the battery body 1 by the connection of the connecting plate 43 and the battery body 1. The connection mode is simple in structure and easy to operate, can realize rapid connection, and improves the assembly efficiency. In addition, the pressure collector 4 is convenient to replace.

[0113] Figure 9 The second temperature collector 45 is integrated on the pressure collector body 41 of the pressure collector 4 in the application. By increasing the second temperature collector 45, the temperature of the battery body 1 can be monitored, the accuracy of the health monitoring of the battery body 1 is further increased, and the safety hazard of the battery body 1 is reduced.

[0114] It should be noted that the second temperature collector 45 can be integrated at any position of the pressure collector body 41. Since the pressure collector body 41 is attached to the first side surface 102, the second temperature collector 45 detects the temperature of the first side surface 102.

[0115] The basic structure of the battery cell assembly 100 is described in detail above. The functions of the data collection module 3 are described below. Figure 11 The functions of the data collection module 3 are described below.

[0116] As shown in Figure 11 The data collection module 3 is integrated with a power supply circuit, a battery voltage monitor, a battery internal resistance monitor, a battery surface temperature monitor, a battery surface pressure monitor, and a thermal runaway monitor.

[0117] The integrated power supply circuit is used for monitoring the current condition of the battery body 1, the battery voltage monitoring is used for monitoring the voltage condition of the battery body 1, the battery internal resistance monitoring is used for monitoring the internal resistance condition of the battery body 1, the battery large surface temperature monitoring is used for monitoring the temperature condition of the first side surface 102 of the battery body 1, the battery large surface pressure monitoring is used for monitoring the pressure condition generated by the battery body 1, and the thermal runaway monitoring is used for monitoring whether the pressure relief valve 12 of the battery body 1 is sprayed to monitor the thermal runaway condition of the battery body 1. The data acquisition module 3 in the application integrates the functions of the functions, can realize multi-dimensional monitoring of the health state of the battery body 1, and is beneficial to reduce the security risk.

[0118] It should be noted that in some embodiments, the data acquisition module 3 also integrates a passive balancing circuit 36. The passive balancing circuit 36 includes but is not limited to a consumption resistor connected in series with the battery body 1, so as to consume the power of the battery body 1 and realize passive balancing of the battery body 1.

[0119] The battery assembly 100 in the application keeps the energy of the battery body 1 consistent with the energy of other battery bodies 1 in the battery pack through the consumption resistor, so as to improve the charging and discharging efficiency of the battery pack.

[0120] When the battery assembly integrated with the consumption circuit is applied to the battery pack, when it is found that the power of a certain battery body 1 is too high, the control unit of the battery pack controls the consumption resistor of the battery body 1 to be connected in parallel with the battery body 1, and reduces the power of the battery body 1 through the consumption of the resistor, so that the power of the battery body 1 is consistent with the power of other battery bodies 1 in the battery pack, so as to improve the charging and discharging efficiency of the battery pack.

[0121] In combination with Figure 12 and Figure 13 It is shown that the application also discloses a battery pack 1000 comprising a plurality of electrically connected battery assemblies 100, wherein the battery assembly 100 is the battery assembly 100 disclosed in the above-mentioned embodiments, therefore, the battery pack 1000 with the battery assembly 100 also has all the technical effects mentioned above, which will not be repeated here.

[0122] As Figure 12 shown, the battery body 1 of the battery assembly 100 in the battery pack 1000 is connected in series, and the data acquisition modules 3 of adjacent battery assemblies 100 are electrically connected. Figure 12 The data acquisition modules 3 of the battery assemblies 100 in the same row are plug-connected, and the data acquisition modules 3 of the battery assemblies 100 at the end of the row are electrically connected with the data acquisition modules 3 of the battery assemblies 100 at the end of the other row through the wire harness 5.

[0123] In some embodiments, the battery cell assemblies 100 in the battery pack 1000 can transfer power to each other to achieve a balance of power in the cell bodies 1 of all battery cell assemblies 100.

[0124] like Figure 13 As shown, the data acquisition module 3 of the battery cell assembly 100 in this application integrates an equalization circuit 37 to achieve equalization of the charge of the series-connected battery cell bodies 1. For example, the equalization circuit 37 may include, but is not limited to, a DC / DC module.

[0125] See Figure 13 As shown, the first side of all equalization circuits 37 is connected to the opposite cell body 1, and the other side of all equalization circuits 37 is electrically connected.

[0126] like Figure 14 As shown, in order to achieve electrical connection on the other side of all equalization circuits 37, in some implementations, a first connector 38 is provided on one side of the data acquisition module 3 of the cell assembly 100, and a second connector 34 is provided on the other side.

[0127] After the battery cell bodies 1 are connected in series, the first connector 38 of the data acquisition module 3 of the battery cell assembly 100 is plugged into the second connector 34 of the data acquisition module 3 of the adjacent battery cell assembly 100; the second connector 34 of the data acquisition module 3 of the battery cell assembly 100 is plugged into the first connector 38 of the data acquisition module 3 of the adjacent battery cell assembly 100 on the other side, thereby realizing the electrical connection between the equalization circuits 37 of the adjacent battery cell assemblies 100.

[0128] By adopting the above connection method, the transfer of power between the cell bodies 1 of the cell assembly 100 in the battery pack 1000 can be realized, so as to achieve the balance (identity) of the power of all cell bodies 1.

[0129] During the operation of the battery pack 1000, the data acquisition module 3 will collect data such as pressure, voltage, internal resistance, and temperature of the battery cell body 1 in real time or intermittently, and then send the collected information to the host computer of the system. The host computer will determine the health status of the battery cell body 1 based on the information obtained and use it to remind the user whether there are any safety hazards in the battery cell body 1.

[0130] Combination Figure 15 and Figure 16 As shown, in order to enable the data acquisition module 3 to transmit data to the host computer, in some embodiments, the data acquisition module 3 transmits the acquired information to the host computer via wire harness data communication, such as... Figure 15 As shown; in some embodiments, a wireless communication module can be integrated into the data acquisition module 3, and the acquired information can be transmitted to the host computer using the wireless communication module, such as... Figure 16 As shown.

[0131] The data acquisition module 3 of each battery cell assembly 100 in the battery pack 1000 is integrated with a wireless communication module, so that each battery cell assembly 100 can independently perform data transmission from the host computer.

[0132] The various embodiments are described in the specification by way of progression, each building on the previous embodiment, but it is contemplated that each embodiment can be implemented or used individually. Accordingly, the embodiments are not limited to the specific embodiments described herein but include all possible implementations that would be perceived by those in the art.

[0133] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell assembly, characterized in that, include: The battery cell body (1) has a positive electrode post (111) and a negative electrode post (112) on any side of the battery cell body (1). The data acquisition module (3) is installed on the cell body (1) and positioned between the positive electrode post (111) and the negative electrode post (112), and is electrically connected to both the positive electrode post (111) and the negative electrode post (112). The data acquisition module (3) is used to monitor the parameters of the cell body.

2. The battery cell assembly according to claim 1, characterized in that, The data acquisition module (3) is electrically connected to the positive electrode post (111) and the negative electrode post (112) by a contact assembly (20) with a press-fit connection.

3. The cell assembly according to claim 2, characterized in that, The contact assembly (20) includes a contact spring (30) and a contact point (10), which can be crimped together to achieve electrical connection; One of the positive electrode post (111) and the data acquisition module (3) is provided with the contact spring (30), and the other is provided with the contact point (10). One of the data acquisition module (3) and the negative electrode cell post (112) is provided with the contact spring (30), and the other is provided with the contact point (10).

4. The cell assembly according to claim 1, characterized in that, The battery cell body (1) has a pressure relief valve (12) located between the positive electrode post (111) and the negative electrode post (112). The data acquisition module (3) has a clearance hole (31) communicating with the pressure relief valve (12). The clearance hole (31) extends along the thickness direction of the data acquisition module (3). The thickness direction is the arrangement direction of the battery cell body (1) and the data acquisition module (3).

5. The cell assembly according to claim 4, characterized in that, A first temperature acquisition module (32) is provided inside the clearance hole (31), and the first temperature acquisition module (32) is used to detect the temperature inside the clearance hole (31).

6. The cell assembly according to any one of claims 1 to 5, characterized in that, The outer shell of the data acquisition module (3) is a high-temperature resistant protective shell.

7. The cell assembly according to any one of claims 1 to 5, characterized in that, Also includes: Pressure acquisition device (4), the pressure acquisition device (4) is used to detect the pressure data generated by the battery cell body (1) on the pressure acquisition device (4), and the data acquisition module (3) is electrically connected to the pressure acquisition device (4) to acquire the pressure data detected by the pressure acquisition device (4).

8. The cell assembly according to claim 7, characterized in that, The battery cell body (1) is a rectangular battery cell, and the pressure acquisition device (4) is located on the first side (102) or the second side with the largest area in the battery cell body (1), with the first side (102) and the second side opposite to each other.

9. The cell assembly according to claim 7, characterized in that, The pressure acquisition device (4) is provided with a first signal pair plug (42) on the side close to the data acquisition module (3), and the data acquisition module (3) is provided with a second signal pair plug (33). The first signal pair plug (42) and the second signal pair plug (33) can be plugged in to realize the electrical connection between the pressure acquisition device (4) and the data acquisition module (3).

10. The cell assembly according to claim 9, characterized in that, The pressure acquisition device (4) integrates a second temperature acquisition module (45), which is used to acquire the temperature of the surface of the battery cell body (1).

11. A battery pack comprising a plurality of electrically connected cell assemblies (100), said cell assembly (100) being the cell assembly (100) as claimed in any one of claims 1 to 10.

12. The battery pack according to claim 11, characterized in that, The data acquisition module (3) of the battery cell assembly (100) integrates an equalization circuit (37). The data acquisition modules (3) of adjacent battery cell assemblies (100) are sequentially plugged in to realize the electrical connection between the equalization circuits (37) of adjacent battery cell assemblies (100).

13. The battery pack according to claim 12, characterized in that, The equalization circuit (37) is a DC / DC module.

14. The battery pack according to claim 11, characterized in that, The data acquisition module (3) of the battery cell assembly (100) integrates a passive equalization circuit (36), which can be connected in parallel with the battery cell body (1) of the battery cell assembly (100).

15. The battery pack according to claim 11, characterized in that, The data acquisition module (3) of the battery cell assembly (100) transmits data through wire harness data communication or through an integrated wireless communication module.

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