Battery module, battery pack and electric equipment

Abstract

The utility model relates to a battery module, a battery pack and electric equipment, the battery module comprises a battery cell, the battery cell comprises a shell and a body, and the body is electrically connected with the shell; the sampling assembly comprises a sampler, the shell is electrically connected with the sampler through a connecting piece, the two ends of the connecting piece are connected to the shell and the sampler respectively, and the sampler is used for collecting parameters of the battery cell. The sampling assembly has the effect of facilitating assembly and repair of the sampling assembly.

Description

Technical Field

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

[0002] At present, when a battery pack is in use, it is necessary to sample the cells in the battery pack through a sampling structure to obtain parameters such as the voltage, temperature and power of the cells, so as to monitor the battery pack during use. In the relevant scheme, the sampling of the single cells in the battery pack is achieved through an integrated sampling harness, which is welded to the sampling terminal of the cell or plugged into the connector of the cell to achieve connection and conduction, thereby achieving parameter sampling.

[0003] In the related art, the sampling terminals and connectors need to be connected to the poles of the battery cells first, and then electrically connected to the collection unit through the sampling harness. This is costly and difficult to repair after a failure occurs. Utility Model Content

[0004] The present application is proposed to solve the above-mentioned problems. According to one aspect of the present application, a battery module is provided, which includes: a battery cell, the battery cell includes a shell and a body, the body is electrically connected to the shell; a sampling component, the sampling component includes a sampler, the shell and the sampler are electrically connected via a connector, both ends of the connector are respectively connected to the shell and the sampler, and the sampler is used to collect parameters of the battery cell.

[0005] Exemplarily, the battery module includes a plurality of stacked battery cells, and two adjacent battery cells are electrically connected.

[0006] Exemplarily, an insulating layer is provided on the shell, and a hole is provided on the insulating layer, wherein the hole exposes the shell so that the shell is electrically connected to the sampler.

[0007] Exemplarily, the sampling component further includes a sampling pad disposed on the housing, the sampling pad is electrically connected to the housing and is at least partially located in the hole, and the connecting member connects the sampling pad and the sampler.

[0008] Exemplarily, the battery cell parameters include at least the voltage, charge and temperature of the battery cell.

[0009] Exemplarily, the connecting member is a metal wire, and two ends of the metal wire are bonded to the housing and the sampler respectively.

[0010] According to another aspect of the present application, a battery pack is provided, comprising: a pack body, a cover plate, a bracket and the above-mentioned battery module; the battery cells of the battery module are installed in the pack body; the cover plate is arranged on the pack body and covers the battery cells, the bracket is connected to the cover plate and the sampler of the battery module through a first positioning piece, and the bracket is connected to the cover plate through a second positioning piece.

[0011] Exemplarily, the bracket includes an upper bracket and a lower bracket, the sampler is connected to the upper bracket via the first positioning member, and the cover is fixed between the upper bracket and the lower bracket via the second positioning member.

[0012] Exemplarily, the first positioning member includes a positioning pin, which passes through the sampler and is connected to the upper bracket.

[0013] Exemplarily, the upper bracket, the lower bracket and the cover plate are all provided with reserved holes for the connecting member to pass through; the second positioning member includes a connecting plate provided on the lower bracket and a buckle provided on the connecting plate, the connecting plate is located in the reserved hole, the buckle is located at the first end of the connecting plate, the buckle includes an elastic plate and a protrusion on the elastic plate, and the protrusion is against the first surface of the upper bracket.

[0014] According to another aspect of the present application, there is provided an electric device, wherein the electric device is powered by the above-mentioned battery pack.

[0015] In the battery module of the present application, the outer shell 11 of the battery cell 1 is electrically connected to the battery cell body, the outer shell 11 is powered on and connected to the sampler, the electrical signal can be drawn out through the outer shell 11, and then electrically connected to the sampler 2 through the connector 4, so that the sampler 2 can obtain various parameters of the battery cell 1. In the present application, the sampling assembly does not need to be connected to the battery pole, the preparation of the sampling assembly is more convenient and the cost is lower, and after the sampling assembly fails and is repaired, it can be welded to the outer shell 11 again, which can effectively reduce the difficulty of repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 A schematic diagram of the structure of a battery module in an embodiment of the present application is shown.

[0018] Figure 2 for Figure 1 Enlarged view of part A.

[0019] Figure 3 A schematic diagram of a battery cell in an embodiment of the present application is shown.

[0020] Figure 4 An exploded schematic diagram of the battery pack structure in an embodiment of the present application is shown.

[0021] Figure 5 for Figure 4 Enlarged view of part B.

[0022] Figure numerals: 1. battery cell; 11. shell; 12. insulation layer; 13. hole; 2. sampler; 3. sampling pad; 4. connector; 5. package body; 51. top cover; 52. positioning pin; 6. cover plate; 7. upper bracket; 8. lower bracket; 81. connecting plate; 82. buckle; 821. elastic plate; 822. protrusion; 9. reserved hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more obvious, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application described in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0024] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery module, which includes a battery cell 1 and a sampling assembly. The battery cell 1 includes a shell 11 and a body, and the body is electrically connected to the shell 11. The sampling assembly includes a sampler 2, and a connector 4 is provided between the shell 11 and the sampler 2, and the two ends of the connector 4 are respectively connected to the shell 11 and the sampler 2, and the sampler 2 is used to collect the battery cell parameters of the battery cell 1.

[0025] In the battery module of the present application, the outer shell 11 of the battery cell 1 is electrically connected to the battery cell body, the outer shell 11 is powered on and connected to the sampler, the electrical signal can be drawn out through the outer shell 11, and then electrically connected to the sampler 2 through the connector 4, so that the sampler 2 can obtain various parameters of the battery cell 1. In the present application, the sampling assembly does not need to be connected to the battery pole, the preparation of the sampling assembly is more convenient and the cost is lower, and after the sampling assembly fails and is repaired, it can be welded to the outer shell 11 again, which can effectively reduce the difficulty of repair.

[0026] Exemplarily, the battery module includes a plurality of stacked battery cells 1, and two adjacent battery cells 1 are electrically connected. Specifically, the battery cells 1 can be electrically connected through a battery cell connecting sheet, so as to realize the internal conduction of the battery module (that is, the series connection of multiple battery cells is realized through the battery cell connecting sheet). For a single battery cell 1, the battery cell 1 includes an internal battery cell body and an external shell 11, wherein the shell 11 is made of metal, and the metal shell 11 can be an aluminum shell 11. The battery cell body includes a pole core and a pole post (not shown in the figure). The shell 11 of the battery cell 1 is electrically connected to the pole post, and the shell 11 of the battery cell 1 is charged after the connection is completed. Exemplarily, the shell 11 is electrically connected to the pole post of the negative electrode to realize that the shell 11 is charged. In some embodiments, the shell 11 can be electrically connected to the pole ear inside the battery cell 1 so that the shell 11 acts as a pole post (such as acting as a negative pole post).

[0027] Exemplarily, the sampler 2 in the embodiment of the present application is a Battery Information Collector (BIC for short). The BIC is applied to a battery management system to collect parameters of the battery cell 1 to monitor the battery module.

[0028] Please refer to Figure 2 and Figure 3 , an insulating layer 12 is formed on the outside of the shell 11 of each battery cell 1 to insulate the two adjacent shells 11 to avoid short circuits due to conduction. Two holes 13 are formed on the insulating layer 12, and the holes 13 expose the shell 11. The sampling component also includes a sampling pad 3, and the hole 13 is used to install the sampling pad 3, and the sampling pad 3 is arranged in the hole 13 to be electrically connected to the shell 11. The number and position of the connector 4 correspond to the sampling pad 3. Exemplarily, only one sampling pad 3 is arranged on the shell 11, and the sampling pad 3 corresponds to one of the holes 13. Among them, the connector 4 is a metal wire, and the metal wire is bonded to the sampling pad 3 at both ends and the sampler 2 respectively, so as to realize the signal connection between the sampler 2 and the shell 11 of the battery cell 1. After the connection is established, the sampler 2 can collect the battery cell parameters of each battery cell 1. Exemplarily, the battery cell parameters include the voltage, circuit and temperature of the battery cell 1. By collecting the battery cell parameters, the battery management system can realize the monitoring of the battery module. Exemplarily, the metal wire used as the connector 4 may be an aluminum wire. Compared with the integrated wiring harness in the related art, the aluminum wire has a lower cost and is more convenient to weld the ends of the aluminum wire, which facilitates assembly and repair.

[0029] In the battery module in the embodiment of the present application, the outer shell 11 of the battery cell 1 is electrically connected to the battery cell body, the outer shell 11 is energized and connected to the sampling pad 3 in the sampling assembly, the signal can be drawn out through the outer shell 11, and the sampling pad 3 is then electrically connected to the sampler 2 through the bonded connector 4, so that the sampler 2 can obtain various parameters of the battery cell 1. In the present application, the sampling assembly does not need to be connected to the pole of the battery, the preparation of the sampling assembly is more convenient and the cost is lower, and after the sampling assembly fails and is repaired, it can be welded to the outer shell 11 again, and the pole does not need to be connected again, which can effectively reduce the difficulty of repair. In addition, the connector 4 can use metal wires such as aluminum wire, which can further reduce the difficulty during assembly and repair, improve efficiency and save costs.

[0030] The insulating layer 12 in the embodiment of the present application is introduced below, because the insulating layer 12 needs to be provided with a hole 13 to install the sampling pad 3, and different methods can be used to form the hole 13 when forming the insulating layer 12. For the insulating layer 12 produced by spraying, two methods can be used to generate the hole 13 to install the sampling pad 3.

[0031] In the first method, the outer shell 11 is divided into an insulating spray surface position and a sampling position of the battery cell 1. The insulating spray surface position and the sampling position of the battery cell 1 are pre-treated accordingly to ensure that the adhesion of the insulating layer 12 has a certain strength and reliability, and at the same time ensure that the insulating coating at the sampling pad 3 of the battery cell 1 is in a state that is easier to peel off. By using laser stripping and cleaning equipment, the coating at the sampling position of the battery cell 1 is stripped to form a hole 13. The sampling position is surface processed to meet the requirements of the sampling pad 3 of the battery cell 1, and the sampling pad 3 can be installed for aluminum wire bonding.

[0032] The second method is to identify the shell 11 that has completed the surface pretreatment through a label masking sheet and use the label masking sheet to mask it before spraying the insulating coating. After the insulating coating is sprayed, the label is removed to form a hole 13, and it is confirmed that the sampling area meets the requirements of the sampling pad 3. The sampling pad 3 can be installed for aluminum wire bonding. The label masking sheet can use a PET label masking sheet.

[0033] In addition, the insulating layer 12 can be formed by using a PET film, and the hole 13 is reserved on the PET film. After the shell 11 of the battery cell 1 is pre-treated accordingly to ensure that the adhesion of the insulating layer 12 has a certain strength and reliability, and the sampling position of the battery cell 1 meets the requirements of the sampling pad 3, the sampling pad 3 is installed at the hole 13 of the PET film.

[0034] For example, welding is performed after the sampler 2 is assembled, and aluminum wire bonding is used for connection. The aluminum wire bonding power is 10.4 W, the bonding time is 210 ms, the bonding pressure is 0.3 kgf, and the wire diameter is 250 um.

[0035] like Figure 4 and Figure 5 As shown, the embodiment of the present application also provides a battery pack, which includes a pack body 5, a cover plate 6, a bracket and the above-mentioned battery module. Among them, the battery cell 1 of the battery module is installed in the pack body 5. The cover plate 6 is arranged on the pack body 5 and covers the battery cell 1, the bracket is connected to the cover plate 6 and the sampler 2 of the battery module through a first positioning member, and the bracket is connected to the cover plate 6 through a second positioning member.

[0036] The battery pack in the embodiment of the present application realizes the assembly and fixation of the sampler 2 through the cover plate 6 and the bracket. When the sampler 2 needs to be repaired, it can be removed from the cover plate 6 together with the bracket for repair. There is no need to adjust the battery cell 1 in the package body 5, which can reduce the difficulty of repair.

[0037] The battery pack in the embodiment of the present application is further introduced below: the bracket includes an upper bracket 7 and a lower bracket 8, the upper bracket 7 is connected to the upper bracket 7 by a first positioning member, and the cover plate 6 is fixed between the upper bracket 7 and the lower bracket 8 by a second positioning member.

[0038] Exemplarily, the first positioning member includes a positioning pin 52, which passes through the sampler 2 and is connected to the upper bracket 7. The sampler 2 and the upper bracket 7 are thus connected together. Among them, a plurality of positioning pins 52 are installed on the sampler 2 and are evenly arranged. On the one hand, the sampler 2 can be installed and fixed, and on the other hand, after the positioning pin 52 is installed, the sampler 2 and the upper bracket 7 can be fitted together, so that the sampler 2 can work normally. Because the sampler 2 and the upper bracket 7 are fixedly connected, when rework is required, the upper bracket 7 can be removed together with the sampler 2 and reworked. Exemplarily, the battery pack also includes a top cover 51, which is detachably mounted on the cover plate 6 and covers the above-mentioned upper bracket 7 and the sampler 2, and can protect the sampler 2. When rework is required, the top cover 51 can be removed to disassemble the upper bracket 7 and the sampler 2. A detachable connection method such as a threaded connection can be used between the top cover 51 and the cover plate 6.

[0039] For example, the cover plate 6 and the package body 5 can be threadedly connected by screws or the like, and after assembly, the cover plate 6 is fixed to the package body 5 to form a stable battery pack structure.

[0040] Exemplarily, double-sided adhesive tape is further provided between the upper bracket 7 and the cover plate 6, specifically, double-sided adhesive tape made of PSA material (not shown in the figure). The double-sided adhesive tape can realize a detachable connection between the upper bracket 7 and the cover plate 6, and the double-sided adhesive tape can realize a certain degree of fixation. When repair is required, the upper bracket 7 and the sampler 2 can still be disassembled.

[0041] Exemplarily, the upper bracket 7, the lower bracket 8 and the cover plate 6 are all provided with a reserved hole 9 for the connection member 4 to pass through. The second positioning member includes a connecting plate 81 provided on the lower bracket 8 and a buckle 82 provided on the connecting plate 81, the connecting plate 81 is located in the reserved hole 9, the buckle 82 is located at the first end of the connecting plate 81, and the buckle 82 includes an elastic plate 821 and a protrusion 822 on the elastic plate 821. After assembly, the protrusion 822 abuts against the first surface of the upper bracket 7 (such as Figure 2 As shown). The first end of the connecting plate 81 is the end away from the lower bracket 8, and the first surface of the upper bracket 7 is the side surface connected to the sampler 2. Because the elastic plate 821 is elastic, the elastic plate 821 can be bent by moving it, so as to facilitate the movement of the upper bracket 7 to enter under the protrusion 822. Through the limiting of the protrusion 822, the cover plate 6, the lower bracket 8 and the upper bracket 7 can be connected together. When disassembly is required, the upper bracket 7 and the cover plate 6 can be disassembled by moving the elastic plate 821.

[0042] It should be noted that, in the embodiment of the present application, the reserved holes 9 on the upper bracket 7, the lower bracket 8 and the cover plate 6 are arranged on both sides, and the reserved holes 9 on both sides are staggered. After the stacking of the battery cells 1 is completed, the reserved holes 9 on both sides correspond to different sampling pads 3 on different battery cells 1. The purpose of this arrangement is to avoid various problems (such as difficulty in heat dissipation, etc.) caused by excessive density of the connector 4 on one side, which is why two holes 13 need to be set on the insulating layer 12 of the battery cell 1. In addition, although there are two holes 13 on each insulating layer 12, there is actually only one hole 13 provided with a sampling pad 3 to establish a connection with the sampler 2.

[0043] The battery pack in the embodiment of the present application uses the above-mentioned battery module, the shell 11 of the battery cell 1 is electrically connected to the battery cell body, the shell 11 is energized and connected to the sampling pad 3 in the sampling assembly, the signal can be drawn through the shell 11, and the sampling pad 3 is then electrically connected to the sampler 2 through the bonded connector 4, so that the sampler 2 can obtain various parameters of the battery cell 1. In the present application, the sampling assembly does not need to be connected to the pole of the battery, the preparation of the sampling assembly is more convenient and the cost is lower, and after the sampling assembly fails and is repaired, it can be welded to the shell 11 again, and the pole does not need to be connected again, which can effectively reduce the difficulty of repair. In addition, the sampler 2 is assembled and fixed in the battery pack by the cover plate 6 and the bracket. When the sampler 2 needs to be repaired, it can be removed from the cover plate 6 together with the bracket for repair, and there is no need to adjust the battery cell 1 in the package body 5, which is convenient for disassembly and repair of the sampler 2.

[0044] The embodiment of the present application also provides an electrical device, which is powered by the above-mentioned battery pack. During the power supply process, if the sampler 2 used for parameter collection fails, the sampler 2 can be disassembled together with the bracket 7, and after the repair is completed, the connection between the housing 11 and the sampler 2 is re-established.

[0045] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0046] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0047] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0048] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0049] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0050] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0051] The various component embodiments of the present application can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some modules according to the embodiments of the present application. The present application can also be implemented as a vehicle-mounted system program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0052] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented with the aid of hardware including several different elements and with the aid of appropriately programmed computers. In a unit claim listing several on-board systems, several of these on-board systems may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0053] The above is only a specific implementation method or description of a specific implementation method of the present application, and the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A battery module, characterized in that: The battery module comprises: A battery cell, the battery cell comprising a shell and a body, the body being electrically connected to the shell; The sampling component includes a sampler, the shell and the sampler are electrically connected via a connector, both ends of the connector are respectively connected to the shell and the sampler, and the sampler is used to collect parameters of the battery cell.

2. The battery module according to claim 1, characterized in that: The battery module includes a plurality of stacked battery cells, and two adjacent battery cells are electrically connected.

3. The battery module according to claim 2, characterized in that: An insulating layer is arranged on the shell, and a hole is arranged on the insulating layer. The hole exposes the shell so that the shell is electrically connected to the sampler.

4. The battery module according to claim 3, characterized in that: The sampling component also includes a sampling pad disposed on the housing, the sampling pad is electrically connected to the housing and is at least partially located in the hole, and the connecting member connects the sampling pad and the sampler.

5. The battery module according to any one of claims 1 to 4, characterized in that: The battery cell parameters include at least the voltage, charge and temperature of the battery cell.

6. The battery module according to any one of claims 1 to 3, characterized in that: The connecting piece is a metal wire, and two ends of the metal wire are bonded to the housing and the sampler respectively.

7. A battery pack, characterized in that: The battery pack comprises: a pack body, a cover plate, a bracket and a battery module as claimed in any one of claims 1 to 6; The battery cells of the battery module are installed in the package; The cover plate is arranged on the package body and covers the battery cell. The bracket is connected to the cover plate and the sampler of the battery module through a first positioning member. The bracket is connected to the cover plate through a second positioning member.

8. The battery pack according to claim 7, characterized in that: The bracket includes an upper bracket and a lower bracket, the sampler is connected to the upper bracket through the first positioning member, and the cover plate is fixed between the upper bracket and the lower bracket through the second positioning member.

9. The battery pack according to claim 8, characterized in that: The first positioning member includes a positioning pin, which passes through the sampler and is connected to the upper bracket.

10. The battery pack according to claim 8, characterized in that: The upper bracket, the lower bracket and the cover plate are all provided with reserved holes for the connecting member to pass through; The second positioning member includes a connecting plate arranged on the lower bracket and a buckle arranged on the connecting plate, the connecting plate is located in the reserved hole, the buckle is located at the first end of the connecting plate, the buckle includes an elastic plate and a protrusion on the elastic plate, and the protrusion is against the first surface of the upper bracket.

11. An electrical device, characterized in that: The electrical device is powered by the battery pack according to any one of claims 7 to 10.

Images