Battery protection board and battery

Abstract

The embodiment of the utility model provides a battery protection board and a battery. The battery protection board comprises a board body and a protection module, the plate body comprises an insulating layer and a conductive layer which are laminated; the protection module is arranged in the insulating layer; wherein the conductive layer is provided with a sampling resistance area, and the sampling resistance area is electrically connected with the protection module. On one hand, as the protection module is arranged in the insulating layer of the plate body, not only can dustproof, moistureproof and anti-interference effects be achieved on the protection module, but also the overall thickness of the battery protection plate can be reduced. And on the other hand, the conductive layer is provided with the sampling resistor region electrically connected with the protection module, that is, one part of the conductive layer is used as a sampling resistor, so that a precise resistor does not need to be additionally arranged, the electronic material cost can be reduced while current acquisition is realized, and the cost of the battery protection plate is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery protection plate and a battery. BACKGROUND

[0002] The battery protection plate is a key component of the battery, and generally comprises a plate body and a sampling resistor and a protection module arranged on the plate body and electrically connected with each other. The sampling resistor is used for collecting a current signal of a charging and discharging circuit, and the protection module is used for monitoring the current of the charging and discharging circuit and controlling the on-off of the charging and discharging circuit, thereby effectively preventing the problem of overcharging or overdischarging of the battery.

[0003] In the related art, the sampling resistor generally adopts a precision resistor. However, the precision resistor has a high cost, which leads to an increase in the cost of the battery protection plate. UTILITY MODEL CONTENT

[0004] The application aims to provide a battery protection plate and a battery, so as to solve the problem of high cost of the sampling resistor of the existing battery protection plate, which leads to an increase in the cost of the battery protection plate.

[0005] In order to solve the above technical problem, the application is implemented as follows:

[0006] In a first aspect, the application discloses a battery protection plate, comprising a plate body and a protection module.

[0007] The plate body comprises an insulating layer and a conductive layer arranged in layers.

[0008] The protection module is arranged in the insulating layer.

[0009] The conductive layer is provided with a sampling resistor area, and the sampling resistor area is electrically connected with the protection module.

[0010] Optionally, the surface of the sampling resistor area is provided with a metal plating layer.

[0011] Optionally, the conductive layer is a copper foil, and the metal plating layer is a copper plating layer.

[0012] Optionally, the thickness direction of the plate body is a first direction, the insulating layer is provided with a plurality of insulating layers, and the plurality of insulating layers are arranged at intervals along the first direction.

[0013] The protection module is provided with a plurality of protection modules, and the plurality of protection modules are arranged in the same insulating layer.

[0014] Optionally, the extension direction of the plate body is a second direction, and the second direction is perpendicular to the first direction.

[0015] The protection module comprises a field effect tube protection module, an ammeter protection module and an integrated circuit protection module which are sequentially and spacedly arranged along the second direction.

[0016] The insulation layer in the middle is a first insulation layer, the first insulation layer has a first side and a second side which are arranged away from each other along the first direction, the ammeter protection module and the integrated circuit protection module are arranged on the first side, and the field effect tube protection module is arranged on the second side.

[0017] Optionally, the interval between the field effect tube protection module and the ammeter protection module along the second direction, and / or the interval between the ammeter protection module and the integrated circuit protection module along the second direction is greater than or equal to 0.8 mm.

[0018] Optionally, the conductive layer comprises a first conductive layer and a second conductive layer.

[0019] The first conductive layer is arranged on the first side, the first conductive layer is provided with a first conductive area and a second conductive area, the first conductive area is opposite to the position of the ammeter protection module and electrically connected to each other, and the second conductive area is opposite to the position of the integrated circuit protection module and electrically connected to each other.

[0020] The second conductive layer is arranged on the second side, the second conductive layer is provided with a third conductive area, the third conductive area is opposite to the position of the field effect tube protection module and electrically connected to each other.

[0021] Optionally, the insulation layer further comprises a second insulation layer, the second insulation layer is arranged on the side of the second conductive layer away from the first insulation layer, the conductive layer further comprises a third conductive layer, and the third conductive layer is arranged on the side of the second insulation layer away from the second conductive layer.

[0022] The sampling resistance area is arranged on the third conductive layer and opposite to the position of the field effect tube protection module.

[0023] Optionally, the insulation layer further comprises a third insulation layer, the third insulation layer is arranged on the side of the third conductive layer away from the second insulation layer, the conductive layer further comprises a fourth conductive layer, and the fourth conductive layer is arranged on the side of the third insulation layer away from the third conductive layer.

[0024] The battery protection plate further comprises a tab connector and a connector, the tab connector and the connector are arranged on the side of the fourth conductive layer away from the third insulation layer, the tab connector is used for electrically connecting with the tab of the battery cell, and the connector is used for electrically connecting with the electrical equipment.

[0025] In a second aspect, the application further discloses a battery, comprising: a battery cell and the battery protection plate.

[0026] In the embodiment of the application, the protection module is arranged in the insulating layer of the plate body, so that the protection module can be prevented from dust, moisture and interference, and the overall thickness of the battery protection plate can be reduced. More importantly, the conductive layer is provided with the sampling resistor area electrically connected with the protection module, that is, a part of the conductive layer is used as the sampling resistor, so that a precise resistor does not need to be additionally arranged, so that the electronic material cost can be reduced while the current collection is realized, and the cost of the battery protection plate can be reduced.

[0027] The additional aspects and advantages of the application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is one of the structural schematic diagrams of the battery protection plate provided by the embodiment of the application;

[0030] Figure 2 is the second structural schematic diagram of the battery protection plate provided by the embodiment of the application;

[0031] Figure 3 is the structural schematic diagram of the first conductive layer and the fourth insulating layer provided by the embodiment of the application;

[0032] Figure 4 is the structural schematic diagram of the second conductive layer and the second insulating layer provided by the embodiment of the application;

[0033] Figure 5 is the structural schematic diagram of the third conductive layer and the second insulating layer provided by the embodiment of the application.

[0034] The drawings show: 1. insulating layer, 11. first insulating layer, 12. second insulating layer, 13. third insulating layer, 14. fourth insulating layer, 15. fifth insulating layer, 2. conductive layer, 21. first conductive layer, 22. second conductive layer, 23. third conductive layer, 231. sampling resistor area, 24. fourth conductive layer, 25. fifth conductive layer, 26. sixth conductive layer, 3. field effect transistor protection module, 31. field effect transistor, 4. electric quantity meter protection module, 41. electric quantity meter, 42. second resistance-capacitance device, 5. integrated circuit protection module, 51. integrated circuit, 52. third resistance-capacitance device, 6. tab connecting piece, 7. connector, X. first direction, Y. second direction. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise that the scope of the present application.

[0036] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the related art, the battery protection board includes a board body, a precision resistor and a protection module. The precision resistor and the protection module are arranged on the surface of the board body. Specifically, the precision resistor and the protection module are electrically connected to the board body by means of tin paste welding. In this way, on the one hand, using the precision resistor as a sampling resistor will increase the cost of the battery protection board. On the other hand, since the precision resistor and the protection module are both devices with a certain thickness, plus the thickness of the tin paste, the overall thickness of the battery protection board will be increased. In addition, the battery protection board also includes a plastic encapsulation piece, which is encapsulated on the surface of the board body to wrap the devices, thereby achieving dustproof, moistureproof and anti-interference of the devices. The plastic encapsulation piece is usually formed by glue injection. In this way, not only the overall thickness of the battery protection board will be further increased, but also environmental problems will be caused.

[0040] The embodiment of the present application provides a battery protection board, which is described in detail below with reference to the accompanying drawings.

[0041] Referring to Figures 1 to 2 , a structure schematic diagram of a battery protection board provided by the embodiment of the present application is shown, referring to Figure 3 , a structure schematic diagram of a first conductive layer and a fourth insulating layer provided by the embodiment of the present application is shown, referring to Figure 4 , a structure schematic diagram of a second conductive layer and a second insulating layer provided by the embodiment of the present application is shown, referring to Figure 5 , a structure schematic diagram of a third conductive layer and a second insulating layer provided by the embodiment of the present application is shown.

[0042] As Figures 1 to 2 shown, the present application provides a battery protection board, which includes a board body and a protection module. The board body includes a laminated insulating layer 1 and a conductive layer 2. The protection module is arranged in the insulating layer 1. The conductive layer 2 is provided with a sampling resistor area 231, and the sampling resistor area 231 is electrically connected to the protection module.

[0043] In the embodiment of the present application, since the protection module is arranged in the insulating layer 1 of the board body, the protection module can not only be dustproof, moistureproof and anti-interference, but also the overall thickness of the battery protection board can be reduced. More importantly, since the conductive layer 2 is provided with the sampling resistor area 231 electrically connected to the protection module, that is, a part of the conductive layer 2 is used as a sampling resistor, so that an additional precision resistor is not needed. In this way, the electronic material cost can be reduced while realizing current collection, which is conducive to reducing the cost of the battery protection board.

[0044] In addition, since the sampling resistor and the protection module of the application are arranged in the insulating layer 1, i.e. no additional plastic package is needed, thus the gluing can be avoided, not only the overall thickness of the battery protection board can be further reduced, but also the environmental protection of the battery protection board can be improved. It can be understood that, in order to further reduce the overall thickness of the battery protection board, the thickness of the device can be as thin as possible, such as the thickness of the device being less than or equal to 0.15 mm.

[0045] It should be noted that the insulating layer 1 and the conductive layer 2 are usually provided in multiple, and the multiple insulating layers 1 and the conductive layers 2 are arranged alternately, so that the adjacent two conductive layers 2 are reliably separated. Based on this, the specific arrangement position of the sampling resistor area 231 and the protection module is not limited in the embodiments of the application, and the person skilled in the art can arrange the sampling resistor in at least one conductive layer 2 and arrange the protection module in at least one insulating layer 1 according to the actual needs (such as the design of the circuit). In addition, the protection module includes but is not limited to the field effect tube protection module 3, the electric quantity meter protection module 4 and the integrated circuit protection module 5. In addition, the sampling resistor area 231 and the conductive member (including the conductive hole and the wire) mentioned below, the conductive area (including the first conductive area, the second conductive area and the third conductive area) are all formed by etching process of the conductive layer 2.

[0046] In some optional embodiments of the application, the surface of the sampling resistor area 231 is provided with a metal plating layer. That is, the sampling resistor is composed of the sampling resistor and the metal plating layer, so as to increase the overall thickness of the sampling resistor, improve the current carrying capacity of the sampling resistor, and be beneficial to improve the reliability of the current conduction of the sampling resistor. It should be noted that the thickness of the metal plating layer is not limited in the embodiments of the application, and the person skilled in the art can adjust it according to the actual needs.

[0047] In some optional embodiments of the application, the conductive layer 2 is a copper foil, and the metal plating layer is a copper plating layer. In this way, on the one hand, when the conductive layer 2 and the metal plating layer are both copper materials, since the conductive performance of the copper material is good and the cost is low, not only the stability of the sampling circuit can be improved, but also the cost of the protection circuit board can be reduced. On the other hand, when the conductive layer 2 and the metal plating layer are both copper materials, since there is no difference in chemical and physical properties, the connection difficulty between the conductive layer 2 and the metal plating layer can be reduced, and the connection quality can be improved, which is beneficial to improve the conductive reliability of the sampling resistor.

[0048] It should be noted that the copper plating layer can be formed by electroplating process directly on the surface of the sampling resistor area 231, or can be formed by welding process by welding the finished copper foil or finished copper sheet with the sampling resistor area 231, which is not limited here, and the person skilled in the art can adjust it according to the actual needs.

[0049] In some optional embodiments of the present application, the thickness direction of the plate body (i.e. the stacking direction of the insulating layer 1 and the conductive layer 2) is the first direction X, the insulating layer 1 is provided with a plurality of insulating layers 1, and the plurality of insulating layers 1 are arranged at intervals along the first direction X; the protection module is provided with a plurality of protection modules, and the plurality of protection modules are arranged in the same insulating layer 1.

[0050] In the embodiments of the present application, by arranging the plurality of protection modules in the same insulating layer 1, the processing difficulty of the plate body can be reduced, and the processing efficiency of the plate body can be improved. In addition, since the thicknesses of different devices are not the same, when the thickness of a device is greater than the thickness of the insulating layer 1, it is often necessary to increase the thickness of the insulating layer 1 or fill glue to better wrap the device. Therefore, by arranging the plurality of protection modules in the same insulating layer 1, the thickness of the other insulating layer 1 can be minimized, thereby further reducing the overall thickness of the battery protection plate.

[0051] The plate body of the embodiments of the present application can be a double-layer plate, a four-layer plate, a six-layer plate or other multi-layer plate. In one of the embodiments, the plate body is a six-layer plate, and the six-layer plate will be described in detail below.

[0052] In some optional embodiments of the present application, as shown in Figure 1 , Figure 3 and Figure 4 , the extension direction of the plate body is the second direction Y, and the second direction Y is perpendicular to the first direction X; the protection module includes the field effect tube protection module 3, the electric quantity meter protection module 4 and the integrated circuit protection module 5 which are arranged at intervals along the second direction Y; the insulating layer 1 located in the middle is the first insulating layer 11, the first insulating layer 11 has a first side and a second side which are arranged away from each other along the first direction X, the electric quantity meter protection module 4 and the integrated circuit protection module 5 are arranged on the first side, and the field effect tube protection module 3 is arranged on the second side.

[0053] Specifically, the first side is provided with a first recess and a second recess at the corresponding positions of the electric quantity meter protection module 4 and the integrated circuit protection module 5, respectively, and by embedding the electric quantity meter protection module 4 in the first recess and embedding the integrated circuit protection module 5 in the second recess, the electric quantity meter protection module 4 and the integrated circuit protection module 5 can be reliably arranged inside the first insulating layer 11. The second side is provided with a third recess at the corresponding position of the field effect tube protection module, and by embedding the field effect tube protection module 3 in the third recess, the field effect tube protection module 3 can be reliably arranged inside the first insulating layer 11.

[0054] In practical applications, the thickness of the first insulating layer 11 located in the middle of the plate body is usually greater than that of the other insulating layers 1. By arranging the above-mentioned three protection modules in the first insulating layer 11, the protection modules can be better wrapped and protected, and the overall thickness of the battery protection plate can be reduced. On the other hand, by arranging the field effect tube protection module 3, the electric quantity meter protection module 4 and the integrated circuit protection module 5 along the second direction Y and on both sides of the first insulating layer 11, the grooves for mounting the protection modules can be dispersedly arranged in the first insulating layer 11, so that the first insulating layer 11 has higher structural strength and better supports other components of the battery protection plate, thereby facilitating the improvement of the stability of the battery protection plate.

[0055] It should be noted that the extension direction of the plate body can be the length direction of the plate body or the width direction of the plate body. In one embodiment, as shown in Figures 2 to 5 the extension direction of the plate body refers to the length direction of the plate body. In addition, the field effect tube protection module 3 includes a metal-oxide-semiconductor field-effect transistor 31 (hereinafter referred to as field effect tube 31) and a first resistor-capacitor (not shown in the figure) electrically connected to each other. The field effect tube 31 serves as a high-speed switch for controlling the on-off of the charging and discharging circuit. The first resistor-capacitor mainly plays a role of current limiting protection, oscillation elimination and switching speed adjustment. The electric quantity meter protection module 4 includes a current meter and a second resistor-capacitor 42 electrically connected to each other. The current meter is used to measure the current size during the charging and discharging process. The second resistor-capacitor 42 mainly plays a role of filtering to improve the measurement accuracy. The integrated circuit protection module 5 includes an integrated circuit 51 (IC) and a third resistor-capacitor 52 electrically connected to each other. The integrated circuit 51 mainly monitors the voltage, current and other parameters of the battery, judges whether the battery is in a safe working range according to the related parameters, and controls the switching of the field effect tube 31, thereby realizing the on-off of the charging and discharging circuit. The third resistor-capacitor 52 mainly plays a role of voltage stabilization and filtering.

[0056] In specific applications, as shown in Figure 3As shown, the first resistor-capacitor, the second resistor-capacitor 42 and the third resistor-capacitor 52 are usually provided in plurality. Taking the third resistor-capacitor 52 as an example, the distance between two adjacent third resistor-capacitors 52 should be greater than or equal to 0.2mm, and the distance between the third resistor-capacitor 52 and the integrated circuit 51 should be greater than or equal to 0.25mm, so as to effectively prevent mutual interference between the devices. In addition, the board body is usually provided with conductive parts (such as conductive holes and wires) connecting different devices. In order to further reduce the interference of the conductive parts on the field effect tube 31, the ammeter and the integrated circuit 51, the distance between the conductive parts and the field effect tube 31, the distance between the conductive parts and the ammeter, and the distance between the conductive parts and the integrated circuit 51 can be controlled to be greater than or equal to 0.3mm.

[0057] In some optional embodiments of the present application, as shown in Figure 3 The distance between the field effect tube protection module 3 and the ammeter protection module 4 along the second direction Y, and / or the distance between the ammeter protection module 4 and the integrated circuit protection module 5 along the second direction Y is greater than or equal to 0.8mm. In this way, the mutual interference between two adjacent protection modules can be reduced, and the circuit stability of the battery protection board can be improved.

[0058] In some optional embodiments of the present application, the conductive layer 2 comprises: a first conductive layer 21 and a second conductive layer 22; the first conductive layer 21 is arranged on the first side, and the first conductive layer 21 is provided with a first conductive area and a second conductive area, the first conductive area is opposite to the position of the ammeter protection module 4 and electrically connected to each other, and the second conductive area is opposite to the position of the integrated circuit protection module 5 and electrically connected to each other; the second conductive layer 22 is arranged on the second side, and the second conductive layer 22 is provided with a third conductive area, the third conductive area is opposite to the position of the field effect tube protection module 3 and electrically connected to each other. In this way, the ammeter protection module 4, the integrated circuit protection module 5 and the field effect tube protection module 3 can be reliably electrically connected to the conductive layer 2, thereby forming a complete charging and discharging circuit.

[0059] Specifically, the first conductive area is provided with a plurality of first pads for welding with the ammeter 41 and the second resistor-capacitor 42, the second conductive area is provided with a plurality of second pads for welding with the integrated circuit 51 and the third resistor-capacitor 52, and the third conductive area is provided with a plurality of third pads for electrically connecting with the field effect tube 31.

[0060] In some optional embodiments of the present application, as shown in Figure 1 , Figure 5As shown, the insulating layer 1 further comprises a second insulating layer 12, the second insulating layer 12 is arranged on the side of the second conductive layer 22 away from the first insulating layer 11, the conductive layer 2 further comprises a third conductive layer 23, the third conductive layer 23 is arranged on the side of the second insulating layer 12 away from the second conductive layer 22; the sampling resistor area 231 is arranged on the third conductive layer 23 and opposite to the position of the field effect tube protection module 3. In this way, since the sampling resistor area 231 is arranged on the third conductive layer 23 and opposite to the position of the field effect tube protection module 3, not only can the reliable electrical connection between the sampling resistor area 231 and the field effect tube protection module 3 be realized, but also the wiring complexity between the sampling resistor area 231 and the field effect tube protection module 3 can be reduced.

[0061] In some optional embodiments of the present application, as shown in Figures 1 to 2 As shown, the insulating layer 1 further comprises a third insulating layer 13, the third insulating layer 13 is arranged on the side of the third conductive layer 23 away from the second insulating layer 12, the conductive layer 2 further comprises a fourth conductive layer 24, the fourth conductive layer 24 is arranged on the side of the third insulating layer 13 away from the third conductive layer 23; the battery protection plate further comprises a tab connecting piece 6 and a connector 7, the tab connecting piece 6 and the connector 7 are both arranged on the side of the fourth conductive layer 24 away from the third insulating layer 13, the tab connecting piece 6 is used for electrical connection with the tab of the battery cell, and the connector 7 is used for electrical connection with the electrical equipment. It should be noted that the fourth conductive layer 24 is the conductive layer 2 located at the outermost layer of the plate body.

[0062] In the embodiments of the present application, on the one hand, since the tab connecting piece 6 is arranged, the reliable connection between the battery cell and the battery protection plate can be realized through the electrical connection between the tab of the battery cell and the tab connecting piece 6. On the other hand, since the connector 7 is arranged, the reliable output of the current can be realized through the electrical connection between the connector 7 and the external electrical equipment. In addition, compared with the case that the tab connecting piece 6 and the connector 7 are arranged on the fourth conductive layer 24 and the sixth conductive layer 26 located at the outermost layer of the plate body respectively, when the tab connecting piece 6 and the connector 7 are both arranged on the fourth conductive layer 24, the thickness of the battery protection plate as a whole can be further reduced, which is beneficial to the thinning design of the battery protection plate.

[0063] It should be noted that the tab connecting piece 6 includes a positive tab connecting piece and a negative tab connecting piece, and the battery cell includes a positive tab and a negative tab, and the reliable connection between the battery protection plate and the battery cell can be realized through the electrical connection between the positive tab connecting piece and the positive tab and the electrical connection between the negative tab connecting piece and the negative tab, so as to improve the safety of the battery. In actual application, the current starts from the positive tab of the battery cell, sequentially flows through the positive tab connecting piece, the sampling resistor (i.e. the sampling resistor area 231 of the present application), the field effect tube protection module 3, the positive pole of the connector 7, the electric device, the negative pole of the connector 7, the integrated circuit protection module 5, the power meter 41 module, the negative tab connecting piece, and finally returns to the negative tab of the battery cell, forming a closed charging and discharging circuit. Among them, the sampling resistor area 231 and the integrated circuit protection module 5, the power meter 41 are connected through the sampling line, so as to realize the monitoring of the current. It should be noted that the above charging and discharging circuit can also include other devices, which are not limited here.

[0064] In addition, as shown in Figure 1 The insulating layer 1 further includes a fourth insulating layer 14 and a fifth insulating layer 15, and the conductive layer 2 further includes a fifth conductive layer 25 and a sixth conductive layer 26. Among them, the fourth insulating layer 14 is arranged on the side of the first conductive layer 21 away from the first insulating layer 11, the fifth conductive layer 25 is arranged on the side of the fourth insulating layer 14 away from the first conductive layer 21, the fifth insulating layer 15 is arranged on the side of the fifth conductive layer 25 away from the fourth insulating layer 14, the sixth conductive layer 26 is arranged on the side of the fifth insulating layer 15 away from the fifth conductive layer 25, and the sixth conductive layer 26 is the outermost layer of the plate body. Through testing, the overall thickness of the battery protection plate with the six-layer plate structure of the present application is not greater than 0.5mm.

[0065] In summary, the battery protection plate provided by the embodiments of the present application has at least the following advantages:

[0066] In the embodiments of the present application, since the protection module is arranged in the insulating layer of the plate body, not only can the protection module be dustproof, moistureproof and anti-interference, but also the overall thickness of the battery protection plate can be reduced. More importantly, since the conductive layer is provided with a sampling resistor area electrically connected with the protection module, i.e. part of the conductive layer is used as a sampling resistor, so that a precise resistor does not need to be additionally arranged, thereby realizing current collection while reducing electronic material cost, which is conducive to reducing the cost of the battery protection plate.

[0067] The embodiment of the application further provides a battery, comprising: a battery cell and the battery protection plate of the above embodiment, the battery protection plate being electrically connected with the battery cell. Specifically, the battery cell comprises a positive pole lug and a negative pole lug, the battery protection plate comprises a positive pole lug connecting piece and a negative pole lug connecting piece, and the reliable connection between the battery cell and the battery protection plate can be realized through the electrical connection between the positive pole lug and the positive pole lug connecting piece and the electrical connection between the negative pole lug and the negative pole lug connecting piece, so that the problem of overcharging or overdischarging of the battery can be effectively prevented, and the safety of the battery can be improved.

[0068] It should be noted that, in the embodiment of the application, the structure of the battery protection plate is the same as that of the battery protection plate of any one of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0069] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery protection plate, characterized in that, The battery protection plate comprises: a plate body and a protection module; the plate body comprises an insulating layer and a conductive layer arranged in layers; the protection module is arranged in the insulating layer; wherein the conductive layer is provided with a sampling resistance area, and the sampling resistance area is electrically connected with the protection module.

2. The battery protection plate of claim 1, wherein, The surface of the sampling resistance area is provided with a metal plating layer.

3. The battery protection plate of claim 2, wherein, The conductive layer is a copper foil, and the metal plating layer is a copper plating layer.

4. The battery protection plate according to any one of claims 1-3, characterized in that, The thickness direction of the plate body is a first direction, the insulating layer is provided with a plurality of insulating layers, and the plurality of insulating layers are arranged in the first direction. The protection module is provided with a plurality of protection modules, and the plurality of protection modules are arranged in the same insulating layer.

5. The battery protection plate of claim 4, wherein, The extension direction of the plate body is a second direction, and the second direction is perpendicular to the first direction. The protection module comprises a field effect tube protection module, an electric quantity meter protection module and an integrated circuit protection module arranged in the second direction. The insulating layer in the middle is a first insulating layer, the first insulating layer has a first side and a second side arranged away from the first direction, the electric quantity meter protection module and the integrated circuit protection module are arranged on the first side, and the field effect tube protection module is arranged on the second side.

6. The battery protection plate of claim 5, wherein, The distance between the field effect tube protection module and the electric quantity meter protection module in the second direction, and / or the distance between the electric quantity meter protection module and the integrated circuit protection module in the second direction is greater than or equal to 0.8mm.

7. The battery protection plate according to claim 5 or 6, characterized in that, The conductive layer comprises: a first conductive layer and a second conductive layer; The first conductive layer is arranged on the first side, the first conductive layer is provided with a first conductive area and a second conductive area, the first conductive area is opposite to the position of the electric quantity meter protection module and is electrically connected with each other, and the second conductive area is opposite to the position of the integrated circuit protection module and is electrically connected with each other; The second conductive layer is arranged on the second side, and the second conductive layer is provided with a third conductive area, and the third conductive area is opposite to the position of the field effect tube protection module and is electrically connected with each other.

8. The battery protection plate of claim 7, wherein, The insulating layer further comprises a second insulating layer, the second insulating layer is arranged on the side of the second conductive layer away from the first insulating layer, the conductive layer further comprises a third conductive layer, and the third conductive layer is arranged on the side of the second insulating layer away from the second conductive layer; The sampling resistance area is arranged on the third conductive layer and opposite to the position of the field effect tube protection module.

9. The battery protection plate of claim 8, wherein, The insulating layer further comprises a third insulating layer, the third insulating layer is arranged on the side of the third conductive layer away from the second insulating layer, the conductive layer further comprises a fourth conductive layer, and the fourth conductive layer is arranged on the side of the third insulating layer away from the third conductive layer; The battery protection plate further comprises a tab connector and a connector, the tab connector and the connector are arranged on the side of the fourth conductive layer away from the third insulating layer, the tab connector is used for electrically connecting with the tab of the battery cell, and the connector is used for electrically connecting with the electric device.

10. A battery, characterized by The battery protection plate comprises: a battery cell and the battery protection plate according to any one of claims 1-9, and the battery protection plate is electrically connected with the battery cell.

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