Wiring harness, battery balancing system and battery balancing method

Abstract

The present application relates to a wiring harness, a battery balancing system and a battery balancing method, and belongs to the field of battery maintenance technology. The present application proposes a wiring harness, including: a wiring harness body; a first battery connector, including M positive potential conductive terminals; a second battery connector, including a zero potential conductive terminal and N positive potential conductive terminals; a third battery connector, the third battery connector including M+N positive potential conductive terminals; a switching mechanism, used to achieve electrical connection or disconnection between the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector. The present application also proposes a battery balancing system and a battery balancing method. The wiring harness is compatible with batteries of different specifications. The wiring harness is used to connect between the battery and the balancing machine, and the battery can be balanced, and the balancing process is simple.

Description

Technical Field

[0001] The present application relates to the technical field of battery maintenance, and in particular to a wiring harness, a battery balancing system, and a battery balancing method. Background Art

[0002] With the continued prosperity of the new energy vehicle market, the power battery industry has rapidly expanded and grown, and lithium battery technology has become increasingly advanced, which has put forward higher requirements for the convenience of power battery maintenance. Due to factors such as the use environment or its own aging, the output voltage of each battery cell inside the battery will be inconsistent after long-term use, which will affect the output voltage of the entire battery and reduce the service life of the battery. Therefore, a balancing machine is needed to balance the output voltage of each battery cell to increase the service life of the battery.

[0003] However, the wiring harness of the existing balancing machine is usually only for balancing batteries of a certain specification. If batteries of other specifications need to be balanced, the wiring harness needs to be replaced. Not only is the balancing process complicated, but also there are problems such as cumbersome classification and inconvenient storage due to too many wiring harnesses. Summary of the invention

[0004] To this end, the present application proposes a wiring harness, a battery balancing system, and a battery balancing method to simplify the battery balancing process.

[0005] A first aspect of the present application provides a wiring harness for connecting a battery and an equalizer, comprising: a wiring harness body, the wiring harness body having a first end and a second end; a first battery connector, arranged at the first end, the first battery connector comprising a zero potential conductive terminal and M positive potential conductive terminals, M being an integer greater than or equal to 1, and the potentials of the M positive potential conductive terminals of the first battery connector increasing sequentially; a second battery connector, arranged at the first end, the second battery connector comprising a zero potential conductive terminal and N positive potential conductive terminals, N being an integer greater than or equal to 1, and the potentials of the N positive potential conductive terminals of the second battery connector increasing sequentially; a third battery connector, arranged at the first end, the third battery connector comprising a zero potential conductive terminal and M+N positive potential conductive terminals, the zero potential conductive terminal of the third battery connector being aligned with the zero potential conductive terminal of the first battery connector. Electrical terminal connection, the 1st to the Mth positive potential conductive terminals of the M+N positive potential conductive terminals of the third battery connector are electrically connected one-to-one with the M positive potential conductive terminals of the first battery connector, and the M+1st to the M+Nth positive potential conductive terminals of the third battery connector are electrically connected one-to-one with the N positive potential conductive terminals of the second battery connector; a first equalizer connector, arranged at the second end, the conductive terminals of the first equalizer connector are electrically connected one-to-one with the conductive terminals of the first battery connector; a second equalizer connector, arranged at the second end, the conductive terminals of the second equalizer connector are electrically connected one-to-one with the conductive terminals of the second battery connector; a switching mechanism, used to realize the electrical connection or disconnection of the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector.

[0006] The wiring harness of the embodiment of the present application has an on-off mechanism, which switches between a connected state and a disconnected state. When the on-off mechanism is in the disconnected state, the battery with M battery cells can be balanced when the first battery connector is connected to the battery with M battery cells and the first equalizer connector is connected to the equalizer, and the battery with N battery cells can be balanced when the second battery connector is connected to the battery with N battery cells and the second equalizer connector is connected to the equalizer; when the on-off mechanism is in the connected state, the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector are connected, that is, the equalizing circuit of the equalizer corresponding to the first equalizer connector and the equalizing circuit corresponding to the second equalizer connector are connected in series, so that when the third battery connector is connected to the battery with M+N battery cells and the first equalizer connector and the second equalizer connector are both connected to the equalizer, the battery with M+N battery cells can be balanced. By controlling the connected or disconnected state of the wiring harness's on-off mechanism and the plug-in matching of the connectors, batteries of different specifications can be balanced. When facing batteries of different specifications, there is no need to replace the wiring harness, which not only simplifies the storage process of the wiring harness, but also simplifies the battery balancing process.

[0007] According to some embodiments of the present application, the on-off mechanism includes a first pair of plug-in connectors and a second pair of plug-in connectors that mate with each other. When the first pair of plug-in connectors and the second pair of plug-in connectors are paired and connected, an electrical connection is achieved between the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector.

[0008] In the above solution, the on-off mechanism is a first pair of plug connectors and a second pair of plug connectors that are paired with each other. The first pair of plug connectors and the second pair of plug connectors can be paired and connected or disconnected by physical plugging and unplugging, which is low-cost and simple and reliable to operate.

[0009] According to some embodiments of the present application, the first pair of plug-in connectors includes two first conductive terminals, both of which are electrically connected to the Mth positive potential conductive terminal of the first battery connector, and the second pair of plug-in connectors includes two second conductive terminals, and the two second conductive terminals of the second pair of plug-in connectors are electrically connected to the zero potential conductive terminal of the second battery connector.

[0010] In the above scheme, when the first pair of plug connectors and the second pair of plug connectors are paired and connected, the two first conductive terminals of the first pair of plug connectors are connected one by one with the two second conductive terminals of the second pair of plug connectors. Since each pair of plug connectors includes two conductive terminals, the plug-in reliability of a pair of plug connectors can be improved.

[0011] According to some embodiments of the present application, the first equalizer connector includes M positive potential conductive terminals and one zero potential conductive terminal, the M positive potential conductive terminals of the first equalizer connector are electrically connected one-to-one with the M positive potential conductive terminals of the first battery connector, the zero potential conductive terminal of the first equalizer connector is electrically connected with the zero potential conductive terminal of the first battery connector, the second equalizer connector includes N positive potential conductive terminals and one zero potential conductive terminal, the N positive potential conductive terminals of the second equalizer connector are electrically connected one-to-one with the N positive potential conductive terminals of the second battery connector, the zero potential conductive terminal of the second equalizer connector is electrically connected with the zero potential conductive terminal of the second battery connector; wherein, the first equalizer connector and the second equalizer connector are both current connectors.

[0012] In the above solution, the first equalizer connector and the second equalizer connector are both current connectors for equalizing the battery. When the on-off mechanism connects the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector, the Mth positive potential conductive terminal of the first equalizer connector and the zero potential conductive terminal of the second equalizer connector are also connected, and the two equalizing circuits of the equalizer are connected in series, and the zero potential conductive terminal of the equalizing circuit corresponding to the second equalizer connector is connected to the Mth positive potential conductive terminal of the equalizing circuit corresponding to the first equalizer connector.

[0013] According to some embodiments of the present application, the second end of the wiring harness body is provided with a third equalizer connector and a fourth equalizer connector, the third equalizer connector includes M positive potential conductive terminals and one zero potential conductive terminal, the M positive potential conductive terminals of the third equalizer connector are electrically connected one-to-one with the M positive potential conductive terminals of the first equalizer connector, the zero potential conductive terminal of the third equalizer connector is electrically connected with the zero potential conductive terminal of the first equalizer connector, the fourth equalizer connector includes N positive potential conductive terminals and one zero potential conductive terminal, the N positive potential conductive terminals of the fourth equalizer connector are electrically connected one-to-one with the N positive potential conductive terminals of the second equalizer connector, the zero potential conductive terminal of the fourth equalizer connector is electrically connected with the zero potential conductive terminal of the second equalizer connector; wherein, the third equalizer connector and the fourth equalizer connector are both voltage connectors.

[0014] In the above scheme, the third equalizer connector and the fourth equalizer connector are both voltage connectors, which are used for sampling during the battery equalization process. When the on-off mechanism connects the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector, the Mth positive potential conductive terminal of the first equalizer connector and the zero potential conductive terminal of the second equalizer connector are also connected, that is, the Mth positive potential conductive terminal of the third equalizer connector and the zero potential conductive terminal of the fourth equalizer connector are connected, and the voltage value collected by the Mth positive potential conductive terminal of the third equalizer connector is the same as the voltage value collected by the zero potential conductive terminal of the fourth equalizer connector.

[0015] According to some embodiments of the present application, M=N.

[0016] In the above solution, the specifications of the batteries corresponding to the first battery connector and the second battery connector are the same, so that two batteries of the same specifications can be balanced at the same time, thereby improving the battery balancing efficiency.

[0017] According to some embodiments of the present application, the wiring harness further includes: a protective cover, which is sleeved on the wiring harness body.

[0018] In the above solution, the protective cover can protect the outer peripheral surface of the wiring harness body, thereby improving the safety of the wiring harness.

[0019] According to some embodiments of the present application, the on-off mechanism is disposed at the first end.

[0020] In the above scheme, the first end of the wiring harness body has enough space to arrange the on-off mechanism, and can simplify the structure of the wiring harness body, improve the safety performance of the wiring harness, reduce the structural complexity of the wiring harness, and thus reduce the manufacturing cost of the wiring harness.

[0021] The second aspect of the present application also provides a battery balancing system, including: a balancing machine; the wiring harness described in the first aspect of the present application, wherein the first balancing machine connector and the second balancing machine connector are configured to dock with the balancing machine.

[0022] Since the wiring harness of the embodiment of the first aspect of the present application is compatible with batteries of different specifications, the battery balancing system of the embodiment of the present application has the advantages of simple balancing process and simple wiring harness storage.

[0023] A third aspect of the present application provides a battery balancing method, the battery balancing method comprising:

[0024] Connecting the third battery connector of the wiring harness described in the embodiment of the first aspect of the present application to a battery;

[0025] The Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector are electrically connected by the on-off mechanism;

[0026] The first equalizer connector and the second equalizer connector are both connected to an equalizer to balance the battery.

[0027] The battery balancing method of the embodiment of the present application is used to balance the battery. Since the wiring harness of the embodiment of the present application is compatible with batteries of different specifications, on the one hand, the wiring harness does not need to be frequently replaced during the battery balancing process, thereby eliminating the step of replacing the wiring harness; on the other hand, since the wiring harness does not need to be classified and saved, the step of classifying the wiring harness is omitted, thereby simplifying the battery balancing process.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 Shown is a schematic diagram of a battery balancing system in some embodiments of the present application;

[0031] Figure 2 Shown are schematic diagrams of the structures of wiring harnesses of some embodiments of the present application;

[0032] Figure 3 Shown is a wiring schematic diagram of a battery balancing system for balancing a first battery in some embodiments of the present application;

[0033] Figure 4 Shown is a wiring schematic diagram of a battery balancing system for balancing a second battery in some embodiments of the present application;

[0034] Figure 5 Shown is a wiring schematic diagram related to a third battery connector and a switching mechanism in a wiring harness of some embodiments of the present application;

[0035] Figure 6 Shown is a wiring schematic diagram related to a third equalizer connector and a fourth equalizer connector of a wiring harness in a battery equalization system in some embodiments of the present application;

[0036] Figure 7What is shown is a flowchart of a battery balancing method according to some embodiments of the present application;

[0037] The above drawings are not provided to scale.

[0038] Icons: 100-battery balancing system; 10-balancing machine; 11-first interface; 12-second interface; 13-third interface; 14-fourth interface; 21-first battery; 211-first sampling interface; 22-second battery; 221-second sampling interface; 23-third battery; 231-third sampling interface; 30-wiring harness; 31-wiring harness body; 311-first end; 312-second end; 321-first battery connector; 322-second battery connector; 323-third battery connector; 331-first balancing machine connector; 332-second balancing machine connector; 333-third balancing machine connector; 334-fourth balancing machine connector; 34-on / off mechanism; 341-first plug-in connector; 342-second plug-in connector; 35-protective cover. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0041] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0042] It should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The term "plurality" used in the present application refers to two or more (including two).

[0044] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. The battery cell may be a cylindrical battery cell or a square battery cell.

[0045] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery mentioned in the present application may include a battery module or a battery pack, etc. The battery generally includes a box for encapsulating one or more battery cells, and the box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. Multiple battery cells can be directly connected in series, in parallel or in a mixed connection to form a battery. Mixed connection means that multiple battery cells are both connected in series and in parallel. Multiple battery cells can also be connected in series, in parallel or in a mixed connection to form a battery module, and multiple battery modules can be connected in series, in parallel or in a mixed connection to form a battery.

[0046] In the related art, when balancing a battery pack composed of multiple battery cells connected in series, a common balancing method is to use the sampling circuit of the battery itself to balance the battery in parallel. However, since the number of battery cells connected in series contained in batteries of different specifications is different, the number of conductive terminals of their sampling interfaces is also different. When faced with sampling interfaces of batteries of different specifications, not only does the balancing machine need to set up corresponding interfaces respectively, but also needs to replace the corresponding wiring harness to connect with the sampling interface of the battery. This not only leads to an increase in the number and types of interfaces of the balancing machine, but also an increase in the types and number of wiring harnesses, which greatly increases the complexity of the battery balancing process.

[0047] After research, the inventor found that among the multiple conductive terminals of the sampling interface of the battery, one is a zero potential conductive terminal, and the rest are positive potential conductive terminals, and each positive potential conductive terminal corresponds to a battery cell; similarly, among the multiple conductive terminals of the interface of the equalizer, one is a zero potential conductive terminal, and the rest are positive potential conductive terminals, each corresponding to a battery cell. When the number of battery cells connected in series included in the battery changes, there is still only one zero potential conductive terminal among the multiple conductive terminals of the sampling terminal of the battery, while the number of positive potential conductive terminals changes. In order to improve the battery balancing efficiency, the existing equalizer is usually provided with two sets of balancing circuits to achieve balancing of two batteries. If the two sets of balancing circuits on the equalizer can be connected in series, it will be possible to achieve balancing of batteries of another specification without changing the structure of the equalizer, simplifying the battery balancing process.

[0048] Based on the above ideas, the inventor of the present application proposed a technical solution, which is to set two groups of balancing circuits on the balancing machine, and selectively connect the highest potential conductive terminals of one group of balancing circuits with the zero potential conductive terminals of the other group of balancing circuits by improving the wiring method inside the wiring harness, so as to connect the two groups of balancing circuits in series, so as to achieve balancing of batteries of another specification. Batteries of different specifications can be balanced using one wiring harness, which simplifies the balancing process.

[0049] Figure 1 Shown is a schematic diagram of a battery balancing system according to some embodiments of the present application.

[0050] like Figure 1 As shown, some embodiments of the present application provide a battery balancing system 100, including a balancing machine 10 and a wiring harness 30, for balancing batteries.

[0051] For ease of description, two specifications of batteries are provided according to the different numbers of battery cells connected in series inside the battery, namely a first battery 21 and a second battery 22. The first battery 21 includes M battery cells connected in series, and the second battery 22 includes N battery cells connected in series, where M and N are both integers ≥1.

[0052] The equalizer 10 includes two groups of equalizer circuits. The equalizer 10 also includes a first interface 11 and a second interface 12. The first interface 11 is an output interface of the first group of equalizer circuits, and the second interface 12 is an output interface of the second group of equalizer circuits.

[0053] It is understandable that the balancing machine 10 can adopt a balancing machine in the prior art that can realize independent charging and discharging of batteries, such as a multi-channel balancing machine. This application does not specifically limit the balancing machine model and the number of batteries that the balancing machine can balance.

[0054] The first battery 21 includes a first sampling interface 211, and the second battery 22 includes a second sampling interface 221. When the first battery 21 supplies power to the outside, the first sampling interface 211 is configured to be connected to the processor to output an electrical signal representing the voltage or current sampling information of the first battery 21; when the first battery 21 is balanced, the first sampling interface 211 is configured to be connected to the balancer 10 through the wiring harness 30 to perform balanced maintenance.

[0055] Figure 2 Shown is a schematic diagram of the structure of the wiring harness of some embodiments of the present application.

[0056] like Figure 2 As shown, the wiring harness 30 includes a first end 311 and a second end 312. The first end 311 is provided with a first battery connector 321 and a second battery connector 322. The first battery connector 321 is used to connect to the sampling port of the first battery 21, and the second battery connector 322 is used to connect to the sampling port of the second battery 22. The second end 312 is provided with a first equalizer connector 331 and a second equalizer connector 332. The first equalizer connector 331 is used to connect to the first interface 11 of the equalizer 10, and the second equalizer connector 332 is used to connect to the second interface 12 of the equalizer 10.

[0057] In some embodiments of the present application, the conductive terminals of the first interface 11, the first equalizer connector 331, the first battery connector 321 and the first sampling interface 211 correspond one to one, and the conductive terminals of the second interface 12, the second equalizer connector 332, the second battery connector 322 and the second sampling interface 221 correspond one to one.

[0058] By connecting the first battery connector 321 of the wiring harness 30 to the first sampling interface 211 of the first battery 21, and connecting the first equalizer connector 331 to the first interface 11 of the equalizer 10, the first battery 21 can be equalized; by connecting the second battery connector 322 of the wiring harness 30 to the sampling port of the second battery 22, and connecting the second equalizer connector 332 to the second interface 12 of the equalizer 10, the second battery 22 can be equalized.

[0059] It is understandable that, since the balancing processes for the first battery 21 and the second battery 22 are independent of each other, the balancing processes for the first battery 21 and the second battery 22 can also be performed simultaneously to improve the balancing process efficiency.

[0060] Figure 3 Shown is a wiring schematic diagram of a battery balancing system for balancing a first battery in some embodiments of the present application; Figure 4 Shown is a wiring schematic diagram of a battery balancing system according to some embodiments of the present application for balancing a second battery.

[0061] like Figure 3 As shown, the first interface 11 includes a zero potential conductive terminal A0 and M positive potential conductive terminals, and the M positive potential conductive terminals are A1 to A M , from A1 to A M The first sampling interface 211 includes a zero potential conductive terminal X0 and M positive potential conductive terminals, and the M positive potential conductive terminals are X1 to X1 in sequence. M , from X1 to X M The first battery connector 321 includes a zero potential conductive terminal H0 and M positive potential conductive terminals, the M positive potential conductive terminals are H1 to H2 in sequence. M , from H1 to H M , the potentials of the M positive potential conductive terminals of the first battery connector 321 increase sequentially.

[0062] The conductive terminals of the first equalizer connector 331 are electrically connected to the conductive terminals of the first battery connector 321 in a one-to-one correspondence. Specifically, the first equalizer connector 331 includes a zero potential conductive terminal P0 and M positive potential conductive terminals, the M positive potential conductive terminals are sequentially P1 to P2. H , from P1 to P M , the potentials of the M positive potential conductive terminals of the first equalizer connector 331 increase in sequence; wherein H0 is electrically connected to P0, H1 is electrically connected to P1, ..., H M With P M Electrical connection.

[0063] When the first equalizer connector 331 is connected to the first interface 11 and the first battery connector 321 is connected to the first sampling interface 211, the conductive terminal A i , P i , H i , X i Electrical connection, 1≤i≤M.

[0064] Similarly, if Figure 4 As shown, the second interface 12 includes a zero potential conductive terminal B0 and N positive potential conductive terminals, the N positive potential conductive terminals are B1 to B N , from B1 to B N The second sampling interface 221 includes a zero potential conductive terminal Y0 and N positive potential conductive terminals, the N positive potential conductive terminals are Y1 to Y2 in sequence. N , from Y1 to Y NThe second battery connector 322 includes a zero potential conductive terminal I0 and N positive potential conductive terminals, the N positive potential conductive terminals are I1 to I2 in sequence. N , the potentials of the N positive potential conductive terminals of the second battery connector 322 increase sequentially.

[0065] The conductive terminals of the second equalizer connector 332 are electrically connected to the conductive terminals of the second battery connector 322 in a one-to-one correspondence. Specifically, the second equalizer connector 332 includes a zero potential conductive terminal Q0 and N positive potential conductive terminals, the N positive potential conductive terminals are sequentially Q1 to Q2. N , the potentials of the N positive potential conductive terminals of the second equalizer connector 332 increase in sequence; wherein, I0 is electrically connected to Q0, I1 is electrically connected to Q1, ..., I N With Q N Electrical connection.

[0066] When the second equalizer connector 332 is connected to the second interface 12 and the second battery connector 322 is connected to the second sampling interface 221, the conductive terminal B j , Q j ,I j , Y j Electrical connection, 1≤j≤N.

[0067] Figure 5 Shown is a wiring schematic diagram related to a third battery connector and a switching mechanism in a wiring harness of some embodiments of the present application.

[0068] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, some embodiments of the present application provide a wiring harness 30, including a wiring harness body 31, a first battery connector 321, a second battery connector 322, a third battery connector 323, a first equalizer connector 331, a second equalizer connector 332, and a switching mechanism 34. The wiring harness body 31 has a first end 311 and a second end 312, the first battery connector 321, the second battery connector 322, and the third battery connector 323 are all arranged at the first end 311, and the first equalizer connector 331 and the second equalizer connector 332 are both arranged at the second end 312. The first battery connector 321 includes a zero potential conductive terminal H0 and M positive potential conductive terminals H1 to H2. M , M is an integer greater than or equal to 1, the M positive potential conductive terminals H1 to H2 of the first battery connector 321 M The second battery connector 322 is disposed at the first end 311. The second battery connector 322 includes a zero potential conductive terminal I0 and N positive potential conductive terminals I1 to IN , N is an integer greater than or equal to 1, the N positive potential conductive terminals I1 to I2 of the second battery connector 322 N The third battery connector 323 is disposed at the first end 311. The third battery connector 323 includes a zero potential conductive terminal K0 and M+N positive potential conductive terminals K1 to K M+N The zero potential conductive terminal K0 of the third battery connector 323 is connected to the zero potential conductive terminal H0 of the first battery connector 321, and the first to Mth positive potential conductive terminals (i.e., K1 to K M ) and the M positive potential conductive terminals (i.e. H1 to H2) of the first battery connector 321. M ) are electrically connected one by one, and the M+1th to M+Nth positive potential conductive terminals of the M+N positive potential conductive terminals of the third battery connector 323 (i.e., K M+1 To K M+N ) and the N positive potential conductive terminals (i.e., I1 to I2) of the second battery connector 322. N ) are electrically connected one by one. The conductive terminals of the first equalizer connector 331 (i.e., P0 to P M ) are electrically connected to the conductive terminals of the first battery connector 321 (ie, H0 to H1) in a one-to-one correspondence. M ), the conductive terminals of the second equalizer connector 332 (i.e., Q0 to Q N ) are electrically connected to the conductive terminals of the second battery connector 322 (i.e., I0 to I N ). The on-off mechanism 34 is used to realize the Mth positive potential conductive terminal H of the first battery connector 321. M The zero-potential conductive terminal I0 of the second battery connector 322 is electrically connected or disconnected.

[0069] The battery balancing system 100 of the embodiment of the present application can also balance a third battery 23 of another specification. Similar to the first battery 21 and the second battery 22, Figure 5 As shown, the third battery 23 includes M+N battery cells connected in series in sequence, and the third battery 23 includes a third sampling interface 231. The third sampling interface 231 includes a zero potential conductive terminal Z0 and M+N positive potential conductive terminals. The M+N positive potential conductive terminals are Z1 to Z M+N , from Z1 to Z M+N , the potential of the positive potential conductive terminal increases successively.

[0070] The third battery connector 323 is located at the first end 311 of the wiring harness body 31. The zero potential conductive terminal K0 of the third battery connector 323 is electrically connected to the zero potential conductive terminal H0 of the first battery connector 321 (i.e., K0 is electrically connected to H0). The M+N positive potential conductive terminals K1 to K2 of the third battery connector 323 are electrically connected to each other. M+N The positive potential conductive terminals K1 to K M The M positive potential conductive terminals H1 to H2 of the first battery connector 321 are connected to M One-to-one electrical connection (i.e. K1 is electrically connected to H1, K2 is electrically connected to H2, ..., K M With H M Electrical connection), positive potential conductive terminal K M+1 to KN and the N positive potential conductive terminals I1 to I2 of the second battery connector 322 N One-to-one electrical connection (i.e. K M+1 Electrically connected to I1, K M+2 Electrically connected to I2, ..., K M+N with I N The zero potential conductive terminal I0 of the second battery connector 322 is selectively connected to the positive potential conductive terminal H0 of the first battery connector 321 through the on-off mechanism 34. M The balancing circuit corresponding to the first battery 21 and the balancing circuit corresponding to the second battery 22 are electrically connected in series.

[0071] The on / off mechanism 34 has a connected state and a disconnected state.

[0072] When the on-off mechanism 34 is in the connected state, the Mth positive potential conductive terminal H of the first battery connector 321 M The zero potential conductive terminal 10 of the second battery connector 322 is electrically connected. When the first balancer connector 331 and the second balancer connector 332 are respectively connected to the first interface 11 and the second interface 12 of the balancer 10 , the third battery 23 can be balanced.

[0073] When the on / off mechanism 34 is in the disconnected state, the first battery connector 321 and the second battery connector 322 are independent of each other inside the wiring harness 30 and have no electrical connection, so that one of the first battery 21 and the second battery 22 can be balanced, or the first battery 21 and the second battery 22 can be balanced at the same time.

[0074] It is understandable that the number of conductive terminals of each battery connector and the connector of the equalizer 10 refers to the number of conductive terminals with an internal electrical connection relationship, which is not necessarily consistent with the actual number of pins or pinholes of each battery connector and the connector of the equalizer 10. For example, in some embodiments of the present application, the first battery connector 321 and the second battery connector 322 are connectors with twenty-eight pins, and among the twenty-eight pins of the first battery connector 321, M+1 pins correspond to the M+1 conductive terminals of the first battery connector 321 in the embodiment of the present application, and the remaining pins are not used; among the twenty-eight pins of the second battery connector 322, N+1 pins correspond to the N+1 conductive terminals of the second battery connector in the embodiment of the present application. The first equalizer connector 331 and the second equalizer connector 332 are connectors with sixteen pins, and among the sixteen pins, M+1 pins correspond to the M+1 conductive terminals of the connector of the equalizer 10 in the present embodiment, and the remaining pins are not used.

[0075] The first sampling interface 211 of the first battery 21 is paired with the first battery connector 321, the second sampling interface 221 of the second battery 22 is paired with the second battery connector 322, the first interface 11 of the equalizer 10 is paired with the first equalizer connector 331, and the second interface 12 is paired with the second equalizer connector 332. For example, the first battery connector 321 is a connector with 28 pins, the first sampling interface 211 of the first battery 21 is a connector with 28 pinholes, and among the 28 pinholes of the first sampling interface 211 of the first battery 21, M+1 pinholes correspond to the M+1 conductive terminals of the first battery connector 321. The first equalizer connector 331 is a connector with 16 pins, the first interface 11 of the equalizer 10 is a connector with 16 pinholes, and among the 16 pinholes of the first interface 11, M+1 pinholes correspond to the M+1 conductive terminals of the first equalizer connector 331.

[0076] It is understandable that M and N may be the same or different. For example, in some embodiments of the present application, M=N=12, that is, the first battery 21 and the second battery 22 are batteries including twelve battery cells connected in series, and the third battery 23 is a battery including twenty-four battery cells connected in series. In other embodiments, M and N may also be different, for example, M=12, N=24, and the third battery 23 is a battery including twenty-six battery cells connected in series.

[0077] It can be understood that the maximum number of battery cells connected in series included in the third battery 23 is M+N, and the number of battery cells connected in series included in the third battery 23 may also be less than M+N, and only the zero potential conductive terminal K0 of the third battery connector 323 and the positive potential conductive terminals arranged in sequence with the same number of battery cells are used, and the remaining conductive terminals are left vacant and unused.

[0078] The on-off mechanism 34 can be arranged at any position of the harness body 31. For example, the on-off mechanism 34 can be arranged at the first end 311 and the second end 312 of the harness body 31, or at the middle of the harness body 31. The on-off mechanism 34 can have various forms. For example, a wire can be led out from the harness body 31, and the two ends of the wire are respectively connected to the Mth positive potential conductive terminal H of the first battery connector 321. M and the zero potential conductive terminal I0 of the second battery connector 322, the on-off mechanism 34 is set on the wire and is a switch controlled manually or electrically; for another example, two wires can be respectively led out from the wiring harness body 31, one end of one wire is connected to the Mth positive potential conductive terminal H of the first battery connector 321 M One end of the other wire is connected to the zero-potential conductive terminal I0 of the second battery connector 322. The on-off mechanism 34 is a pair of plug-in connectors. The other ends of the two wires are respectively connected to one of the plug-in connectors. The pair of plug-in connectors are plugged in or separated to realize the connection or disconnection of the on-off mechanism 34.

[0079] The wiring harness 30 of the embodiment of the present application has an on-off mechanism 34, which switches between a connected state and a disconnected state. When the on-off mechanism 34 is in the disconnected state, it can balance the first battery 21 having M battery cells when the first battery connector 321 is connected to the first sampling interface 211 and the first equalizer connector 331 is connected to the first interface 11 of the equalizer 10, and balance the second battery 22 having N battery cells when the second battery connector 322 is connected to the second sampling interface 221 and the second equalizer connector 332 is connected to the second interface 12 of the equalizer 10. When the on-off mechanism 34 is in the connected state, the Mth positive potential conductive terminal of the first battery connector 321 and the zero potential conductive terminal of the second battery connector 322 are connected (i.e., the conductive terminal H MThe first equalizer connector 331 is electrically connected to the equalizer 10, that is, the equalization circuit of the equalizer 10 corresponding to the first equalizer connector 331 and the equalization circuit corresponding to the second equalizer connector 332 are connected in series, so that when the third battery connector 323 is connected to the third sampling interface 231 of the third battery 23, the first equalizer connector 331 is connected to the first interface 11 of the equalizer 10, and the second equalizer connector 332 is connected to the second interface 12 of the equalizer 10, the third battery 23 having M+N battery cells is equalized. Through the connection or disconnection state of the on-off mechanism 34 of the wiring harness 30 and the plug-in matching of each connector, batteries of different specifications can be equalized. When facing batteries of different specifications, there is no need to replace the wiring harness 30, which not only simplifies the storage process of the wiring harness 30, but also simplifies the battery balancing process.

[0080] like Figure 2 and Figure 5 As shown, in some embodiments of the present application, the on-off mechanism 34 includes a first pair of plug connectors 341 and a second pair of plug connectors 342 that are paired with each other. When the first pair of plug connectors 341 and the second pair of plug connectors 342 are paired and connected, the Mth positive potential conductive terminal HM of the first battery connector 321 and the zero potential conductive terminal I0 of the second battery connector 322 are electrically connected.

[0081] The first plug-in connector 341 and the second plug-in connector 342 each include a plurality of conductive terminals, and the number and position of the conductive terminals of the first plug-in connector 341 and the conductive terminals of the second plug-in connector 342 correspond one to one. When the first plug-in connector 341 and the second plug-in connector 342 are mated and connected, each conductive terminal of the first plug-in connector 341 is connected to a corresponding conductive terminal of the second plug-in connector 342.

[0082] In the above scheme, the on-off mechanism 34 is a first pair of plug connectors 341 and a second pair of plug connectors 342 that are paired with each other. The first pair of plug connectors 341 and the second pair of plug connectors 342 can be paired and connected or disconnected by physical plugging and unplugging, which is low-cost and simple and reliable to operate.

[0083] In some embodiments of the present application, the first plug-in connector 341 includes two first conductive terminals, both of which are connected to the Mth positive potential conductive terminal H of the first battery connector 321. M Electrically connected, the second plug-in connector 342 includes two second conductive terminals, and the two second conductive terminals of the second plug-in connector 342 are electrically connected to the zero-potential conductive terminal I0 of the second battery connector 322 .

[0084] Specifically, if Figure 5As shown, the two first conductive terminals of the first plug connector 341 are E1 and E2, and the two second conductive terminals of the second plug connector 342 are F1 and F2, and both E1 and E2 are connected to H M When the first plug connector 341 and the second plug connector 342 are mated and connected, E1 and F1 are electrically connected, and E2 and F2 are electrically connected to each other. M Connect to I0, and P M Electrically connected to Q0.

[0085] In some embodiments of the present application, the first pair of plug connectors 341 and the second pair of plug connectors 342 are a pair of EL type terminals. In other embodiments, the first pair of plug connectors 341 and the second pair of plug connectors 342 may also be a pair of connectors in other forms.

[0086] In the above scheme, when the first pair of plug connectors 341 and the second pair of plug connectors 342 are paired and connected, the two first conductive terminals of the first pair of plug connectors 341 are connected one by one with the two second conductive terminals of the second pair of plug connectors 342. Since each pair of plug connectors includes two conductive terminals, the plug-in reliability of a pair of plug connectors can be improved.

[0087] like Figure 3 As shown, in some embodiments of the present application, the first equalizer connector 331 includes a zero potential conductive terminal P0 and M positive potential conductive terminals (ie, P1 to P M The M positive potential conductive terminals (i.e., P1 to P2) of the first equalizer connector 331 are M ) and the M positive potential conductive terminals (i.e. H1 to H2) of the first battery connector 321. M ) are electrically connected one-to-one, and the zero potential conductive terminal P0 of the first equalizer connector 331 is electrically connected to the zero potential conductive terminal H0 of the first battery connector 321. Figure 4 As shown, the second equalizer connector 332 includes a zero potential conductive terminal Q0 and N positive potential conductive terminals (ie, Q1 to Q N ), the N positive potential conductive terminals of the second equalizer connector 332 are electrically connected to the N positive potential conductive terminals of the second battery connector 322 one by one, and the zero potential conductive terminal Q0 of the second equalizer connector 332 is electrically connected to the zero potential conductive terminal I0 of the second battery connector 322; wherein the first equalizer connector 331 and the second equalizer connector 332 are both current connectors.

[0088] In the above solution, the first equalizer connector 331 and the second equalizer connector 332 are both current connectors for equalizing the batteries. Figure 5It can be seen that when the on-off mechanism 34 connects the Mth positive potential conductive terminal H of the first battery connector 321 M When connected to the zero potential conductive terminal I0 of the second battery connector 322, the Mth positive potential conductive terminal P of the first equalizer connector 331 is also connected. M The zero potential conductive terminal Q0 of the second equalizer connector 332 is connected to connect the two equalizer circuits in series. The zero potential conductive terminal B0 of the equalizer circuit corresponding to the second equalizer connector 332 is connected to the Mth positive potential conductive terminal A of the equalizer circuit corresponding to the first equalizer connector 331. M connect.

[0089] Figure 6 Shown is a wiring schematic diagram related to a third equalizer connector and a fourth equalizer connector of a wiring harness in a battery equalization system in some embodiments of the present application.

[0090] like Figure 2 and Figure 6 As shown, in some embodiments of the present application, the second end 312 of the harness body 31 is provided with a third equalizer connector 333 and a fourth equalizer connector 334. The third equalizer connector 333 includes a zero potential conductive terminal S0 and M positive potential conductive terminals S1 to S M , the M positive potential conductive terminals (i.e., S1 to S M ) and the M positive potential conductive terminals (P1 to P M ) are electrically connected one by one, and the zero potential conductive terminal S0 of the third equalizer connector 333 is electrically connected to the zero potential conductive terminal P0 of the first equalizer connector 331. The fourth equalizer connector 334 includes a zero potential conductive terminal T0 and N positive potential conductive terminals (T1 to T N ), the N positive potential conductive terminals (i.e., T1 to T N ) and the N positive potential conductive terminals (i.e., Q1 to Q N ) are electrically connected one-to-one, the zero potential conductive terminal T0 of the fourth equalizer connector 334 is electrically connected to the zero potential conductive terminal Q0 of the second equalizer connector 332; wherein the third equalizer connector 333 and the fourth equalizer connector 334 are both voltage connectors.

[0091] The equalizer 10 further includes a third interface 13 and a fourth interface 14. The third interface 13 includes a zero potential conductive terminal C0 and M positive potential conductive terminals. The M positive potential conductive terminals are C1 to C M , from C1 to C M, the potential of the positive potential conductive terminal increases in sequence; similarly, the fourth interface 14 includes a zero potential conductive terminal D0 and M positive potential conductive terminals, the M positive potential conductive terminals are sequentially D1 to D M , from D1 to D M , the potentials of the positive potential conductive terminals increase in sequence. The third interface 13 is a sampling interface of the first group of equalizing circuits, and the fourth interface 14 is a sampling interface of the second group of equalizing circuits.

[0092] In the above solution, the third equalizer connector 333 and the fourth equalizer connector 334 are both voltage connectors for sampling during the battery equalization process. M When connected to the zero potential conductive terminal I0 of the second battery connector 322, the Mth positive potential conductive terminal P of the first equalizer connector 331 is also connected. M The zero potential conductive terminal Q0 of the second equalizer connector 332 is connected to the Mth positive potential conductive terminal S of the third equalizer connector 333. M The zero potential conductive terminal T0 of the fourth equalizer connector 334 is connected to the Mth positive potential conductive terminal S M The collected voltage value is the same as the voltage value collected by the zero-potential conductive terminal T0 of the fourth equalizer connector 334 .

[0093] In some embodiments of the present application, M=N.

[0094] For example, M=N=12, M+N=24; for another example, M=N=6, M+N=12.

[0095] In the above solution, the specifications of the batteries corresponding to the first battery connector 321 and the second battery connector 322 are the same, so that two batteries of the same specifications can be balanced at the same time, thereby improving the balancing efficiency of batch batteries.

[0096] like Figure 2 As shown, in some embodiments of the present application, the wire harness 30 further includes a protective cover 35 which is sleeved on the wire harness body 31 .

[0097] The protective cover 35 is sleeve-shaped, and the two axial ends of the protective cover 35 have openings respectively. The wiring harness body 31 passes through the interior of the protective cover 35. The first end 311 of the wiring harness body 31 passes through the protective cover 35 from one opening and is connected to the first battery connector 321, the second battery connector 322 and the third battery connector 323. The second end 312 passes through the other opening and is connected to the first equalizer connector 331, the second equalizer connector 332 and the third equalizer connector 333. The wiring harness body 31 includes a plurality of groups of insulated wires arranged in parallel, and the two ends of the wires are respectively connected to two corresponding conductive terminals.

[0098] The material of the protective cover 35 is an insulating and wear-resistant material, which may be nylon or PVC.

[0099] In the above solution, the outer peripheral surface of the wire harness body 31 can be protected by the protective cover 35 , thereby improving the safety of the wire harness 30 .

[0100] like Figure 2 As shown, in some embodiments of the present application, the on-off mechanism 34 is disposed at the first end 311 .

[0101] Specifically, the first end 311 of the wire harness body 31 is exposed to the outside of the protective cover 35 , and the first plug-in connector 341 and the second plug-in connector 342 are both disposed at the first end 311 .

[0102] In the above scheme, the first end 311 of the wiring harness body 31 has sufficient space to arrange the on-off mechanism 34, and can simplify the structure of the wiring harness body 31, improve the safety performance of the wiring harness 30, reduce the structural complexity of the wiring harness 30, and thus reduce the manufacturing cost of the wiring harness 30.

[0103] Some embodiments of the present application further provide a battery balancing system 100 , including a balancing machine 10 and a wiring harness 30 , wherein a first balancing machine connector 331 and a second balancing machine connector 332 are configured to be connected to the balancing machine 10 .

[0104] Specifically, the first equalizer connector 331 is configured to be connected to the first interface 11 , and the second equalizer connector 332 is configured to be connected to the second interface 12 .

[0105] Based on the aforementioned implementation that the wiring harness 30 further includes a third equalizer connector 333 and a fourth equalizer connector 334 , the third equalizer connector 333 is configured to dock with the third interface 13 , and the fourth equalizer connector 334 is configured to dock with the fourth interface 14 .

[0106] Since the wiring harness 30 of some embodiments of the present application is compatible with batteries of different specifications, the battery balancing system 100 of the embodiments of the present application has the advantages of simple balancing process and simple storage of the wiring harness 30 .

[0107] Figure 7 Shown is a flowchart of a battery balancing method according to some embodiments of the present application.

[0108] like Figure 7 As shown, some embodiments of the present application provide a battery balancing method, the battery balancing method comprising:

[0109] S100: Connecting the third battery connector 323 of the wiring harness 30 of some embodiments of the present application to a battery (ie, the third battery 23);

[0110] S200: The Mth positive potential conductive terminal H of the first battery connector 321 is realized by the on-off mechanism 34 M and electrically connected to the zero potential conductive terminal I0 of the second battery connector 322;

[0111] S300: The first balancer connector 331 and the second balancer connector 332 are both connected to the balancer 10 to balance the battery (ie, the third battery 23).

[0112] By implementing steps S100 , S200 and S300 , the third battery 23 can be equalized.

[0113] In some embodiments of the present application, S100: connecting the third battery connector 323 of the wiring harness 30 of some embodiments of the present application to the battery (ie, the third battery 23), including:

[0114] S110 : connecting the third battery connector 323 to the third sampling interface 231 of the third battery 23 .

[0115] In some embodiments of the present application, S200: Using the on-off mechanism 34 to realize the Mth positive potential conductive terminal H of the first battery connector 321 M The zero potential conductive terminal I0 of the second battery connector 322 is electrically connected, including:

[0116] S210 : mate and connect the first plug-in connector 341 and the second plug-in connector 342 .

[0117] In some embodiments of the present application, S300: the first balancer connector 331 and the second balancer connector 332 are both connected to the balancer 10 to balance the battery (ie, the third battery 23), including:

[0118] S310: Connect the first equalizer connector 331 to the first interface 11 of the equalizer 10, and connect the second interface 12 of the second equalizer connector 332;

[0119] S320: Connect the third balancer connector 333 to the third interface 13 of the balancer 10, and connect the fourth interface 14 of the fourth balancer connector 334.

[0120] In some embodiments of the present application, the battery balancing method further includes:

[0121] S400 : connecting the first equalizer connector 331 to the first interface 11 , connecting the third equalizer connector 333 to the third interface 13 , and connecting the first battery connector 321 to the first sampling interface 211 .

[0122] By implementing step S400 , the first battery 21 can be equalized.

[0123] In some embodiments of the present application, the battery balancing method further includes:

[0124] S500 : Connect the second equalizer connector 332 to the second interface 12 , connect the fourth equalizer connector 334 to the fourth interface 14 , and connect the first battery connector 321 to the second sampling interface 221 .

[0125] By implementing step S500 , the second battery 22 can be equalized.

[0126] S600: Perform steps S400 and S500 simultaneously.

[0127] By implementing step S600 , the first battery 21 and the second battery 22 can be balanced at the same time.

[0128] When the battery balancing method of the embodiment of the present application is used to balance the battery, since the wiring harness 30 is compatible with batteries of different specifications, on the one hand, the wiring harness 30 does not need to be frequently replaced during the battery balancing process, thereby eliminating the step of replacing the wiring harness 30; on the other hand, since the wiring harness 30 does not need to be classified and stored, the step of classifying the wiring harness 30 is eliminated, thereby simplifying the battery balancing process.

[0129] like Figures 1 to 7 As shown, some embodiments of the present application provide a battery balancing system 100, including a balancing machine 10 and a wiring harness 30, wherein the battery balancing system 100 is suitable for balancing a first battery 21 including 12 battery cells connected in series, a second battery 22 including 12 battery cells connected in series, and a third battery 23 including 24 battery cells connected in series.

[0130] The wiring harness 30 includes a first end 311 and a second end 312. The first end 311 is provided with a first battery connector 321, a second battery connector 322, a third battery connector 323, a first plug-in connector 341 and a second plug-in connector 342. The second end 312 is provided with a first equalizer connector 331, a second equalizer connector 332, a third equalizer connector 333 and a fourth equalizer connector 334. The conductive terminals of the first battery connector 321, the conductive terminals of the first equalizer connector 331 and the conductive terminals of the third equalizer connector 333 are electrically connected one by one, and the conductive terminals of the second battery connector 322, the conductive terminals of the second equalizer connector 332 and the conductive terminals of the fourth equalizer connector 334 are electrically connected one by one. The first equalizer connector 331, the second equalizer connector 332, the third equalizer connector 333 and the fourth equalizer connector 334 correspond to the first interface 11, the second interface 12, the third interface 13 and the fourth interface 14 of the equalizer 10, respectively. There are two independent equalizing circuits inside the equalizer 10. The first interface 11 is the power output interface of the first equalizing circuit, the first equalizer connector 331 is a current connector, the third interface 13 is the sampling interface of the first equalizing circuit, and the third equalizer connector 333 is a voltage connector. The second interface 12 is the power output interface of the second equalizing circuit, the second equalizer connector 332 is a current connector, the fourth interface 14 is the sampling interface of the second equalizing circuit, and the fourth equalizer connector 334 is a voltage connector.

[0131] The first battery connector 321 has one zero potential conductive terminal H0 and 12 positive potential conductive terminals H1 to H2. 12 , the potentials of the 12 positive potential conductive terminals are increasing; the second battery connector 322 has a zero potential conductive terminal I0 and 12 positive potential conductive terminals I1 to I 12 The potentials of the 12 positive potential conductive terminals are increasing. The third battery connector 323 has 1 zero potential conductive terminal K0 and 24 positive potential conductive terminals K1 to K 24 , the 24 positive potential conductive terminals are increasing in an ascending trend, among which K0 is electrically connected to H0, K1 to K 12 Respectively with H1 to H 12 One-to-one electrical connection, K 13 To K 24 Respectively with I1 to I 12 The conductive terminal of the first plug connector 341 and the Mth positive potential conductive terminal H of the first battery connector 321 are electrically connected in a one-to-one correspondence. M Electrically connected, the conductive terminal of the second plug-in connector 342 is electrically connected to the zero-potential conductive terminal I0 of the second battery connector 322 .

[0132] When the first plug-in connector 341 is mated with the second plug-in connector 342, H M Connected to I0 to form a cascade, that is, the positive potential conductive terminal A of the first interface 11 of the equalizer 10 M The second interface is connected to the zero potential conductive terminal B0 to connect the two equalizing circuits of the equalizing machine 10 in series, so as to equalize the third battery 23 .

[0133] The battery balancing system has the following balancing modes, which are described in detail as follows.

[0134] Single first battery balancing mode: connect the first balancer connector 331 to the first interface 11 , connect the third balancer connector 333 to the third interface 13 , and connect the first battery connector 321 to the first sampling interface 211 ;

[0135] Single second battery balancing mode: connect the second balancer connector 332 to the second interface 12 , connect the fourth balancer connector 334 to the fourth interface 14 , and connect the first battery connector 321 to the second sampling interface 221 ;

[0136] First battery and second battery simultaneous balancing mode: performing the above-mentioned single first battery balancing mode and the above-mentioned single second battery balancing mode simultaneously;

[0137] Single third battery balancing mode: connect the first plug-in connector 341 and the second plug-in connector 342 in pairs, connect the first balancer connector 331 to the first interface 11, connect the third balancer connector 333 to the third interface 13, connect the first battery connector 321 to the second sampling interface 221, and connect the third battery connector 323 to the third sampling interface 231.

[0138] Since the wiring harness 30 of the battery balancing system 100 of the embodiment of the present application is compatible with the above-mentioned balancing modes, the balancing process of the third battery 23 can be realized on the basis that the balancing machine 10 has the first interface 11, the second interface 12, the third interface 13 and the fourth interface 14. Since only the wiring harness 30 is improved, the balancing process of batteries with a larger output voltage can be further realized by using the interface of the existing balancing machine 10, which not only has a low improvement cost, but also reduces the types and quantities of wiring harnesses 30 required for balancing batteries of different specifications, thereby simplifying the battery balancing process.

[0139] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0140] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wiring harness for connecting a battery and an equalizer, characterized in that: include: a wiring harness body having a first end and a second end; a first battery connector, disposed at the first end, the first battery connector comprising a zero potential conductive terminal and M positive potential conductive terminals, M being an integer greater than or equal to 1, and potentials of the M positive potential conductive terminals of the first battery connector increasing in sequence; a second battery connector, disposed at the first end, the second battery connector comprising a zero potential conductive terminal and N positive potential conductive terminals, N being an integer greater than or equal to 1, and potentials of the N positive potential conductive terminals of the second battery connector increasing in sequence; a third battery connector, arranged at the first end, the third battery connector comprising a zero potential conductive terminal and M+N positive potential conductive terminals, the zero potential conductive terminal of the third battery connector being connected to the zero potential conductive terminal of the first battery connector, the 1st to the Mth positive potential conductive terminals of the M+N positive potential conductive terminals of the third battery connector being electrically connected one-to-one with the M positive potential conductive terminals of the first battery connector, and the M+1st to the M+Nth positive potential conductive terminals of the M+N positive potential conductive terminals of the third battery connector being electrically connected one-to-one with the N positive potential conductive terminals of the second battery connector; A first equalizer connector, disposed at the second end, wherein the conductive terminals of the first equalizer connector are electrically connected to the conductive terminals of the first battery connector in a one-to-one correspondence; A second equalizer connector, disposed at the second end, the conductive terminals of the second equalizer connector being electrically connected to the conductive terminals of the second battery connector in a one-to-one correspondence; The on-off mechanism is used to realize electrical connection or disconnection between the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector.

2. The wire harness according to claim 1, characterized in that: The on-off mechanism includes a first pair of plug connectors and a second pair of plug connectors that mate with each other. When the first pair of plug connectors and the second pair of plug connectors are mated and connected, the Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector are electrically connected.

3. The wire harness according to claim 2, characterized in that: The first pair of plug-in connectors includes two first conductive terminals, both of which are electrically connected to the Mth positive potential conductive terminal of the first battery connector, and the second pair of plug-in connectors includes two second conductive terminals, both of which are electrically connected to the zero potential conductive terminal of the second battery connector.

4. The wire harness according to claim 1, characterized in that: The first equalizer connector includes M positive potential conductive terminals and one zero potential conductive terminal, the zero potential conductive terminal of the first equalizer connector is electrically connected to the zero potential conductive terminal of the first battery connector, the M positive potential conductive terminals of the first equalizer connector are electrically connected one-to-one with the M positive potential conductive terminals of the first battery connector, the second equalizer connector includes N positive potential conductive terminals and one zero potential conductive terminal, the N positive potential conductive terminals of the second equalizer connector are electrically connected one-to-one with the N positive potential conductive terminals of the second battery connector, and the zero potential conductive terminal of the second equalizer connector is electrically connected to the zero potential conductive terminal of the second battery connector; Wherein, the first equalizer connector and the second equalizer connector are both current connectors.

5. The wire harness according to claim 4, characterized in that: The second end of the wiring harness body is provided with a third equalizer connector and a fourth equalizer connector, the third equalizer connector includes M positive potential conductive terminals and one zero potential conductive terminal, the M positive potential conductive terminals of the third equalizer connector are electrically connected to the M positive potential conductive terminals of the first equalizer connector in one-to-one correspondence, the zero potential conductive terminal of the third equalizer connector is electrically connected to the zero potential conductive terminal of the first equalizer connector, the fourth equalizer connector includes N positive potential conductive terminals and one zero potential conductive terminal, the N positive potential conductive terminals of the fourth equalizer connector are electrically connected to the N positive potential conductive terminals of the second equalizer connector in one-to-one correspondence, the zero potential conductive terminal of the fourth equalizer connector is electrically connected to the zero potential conductive terminal of the second equalizer connector; Wherein, the third equalizer connector and the fourth equalizer connector are both voltage connectors.

6. The wiring harness according to any one of claims 1 to 5, characterized in that: M=N.

7. The wire harness according to any one of claims 1 to 5, characterized in that: The wiring harness also includes: The protective cover is sleeved on the wiring harness body.

8. The wiring harness according to any one of claims 1 to 5, characterized in that: The on-off mechanism is arranged at the first end.

9. A battery balancing system, characterized in that: include: Equalizer; The wire harness according to any one of claims 1 to 8, wherein the first equalizer connector and the second equalizer connector are configured to dock with the equalizer.

10. A battery balancing method, characterized in that: The battery balancing method comprises: Connecting the third battery connector of the wiring harness according to any one of claims 1 to 8 to a battery; The Mth positive potential conductive terminal of the first battery connector and the zero potential conductive terminal of the second battery connector are electrically connected by the on-off mechanism; The first equalizer connector and the second equalizer connector are both connected to an equalizer to balance the battery.

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